The phrase "a rationale behind the" is correct and usable in written English.
It can be used when explaining the reasoning or justification for a particular action, decision, or idea.
Example: "The report outlines a rationale behind the proposed changes to the policy, emphasizing the need for improvement."
Alternatives: "a reason for the" or "an explanation for the".
There is a rationale behind the squeaky carrot toys.
But there is also a rationale behind the emphasis on size and volume.
3 For a rationale behind the taboo highlighting the indiscriminate and uniquely gruesome aspects of chemical weapons, see Samantha Power's comments before the Center for American Progress on Sept. 6, 2013.
Because they bear the brunt of travelers' frustration and anger, airline executives said they could use more help from the government explaining that there is a rationale behind the inconsistencies.
Explaining the purpose of the activities provided students with a rationale behind the use of active learning in the classroom.
As ridiculous as it seems, there is a rationale behind the pile on of investors, founders and executives that use the festival as a networking opportunity: Yes, you can win "deals" at Burning Man.
There is a rationale behind exploring the possible benefits of such a program in reducing risk of falls.
This paper describes a rationale behind designing workflow systems based on the Unix make by showing a number of idioms useful for workflows comprising many tasks.
The binding free energy analysis provides a plausible rationale behind the experimental dissociation constants and suggests a key role of ligand protein van der Waals interactions in restoring binding affinity.
Even so, we find a convergence of the dominant expression patterns and we identify a similar rationale behind the process of carcinogenesis.
The lack of wall text or some kind of room brochure touches on a larger problem with "Ex.06.01.06103," and that is the absence of a clear rationale behind the choice of the artworks and their arrangement.
