The third proportional to 24 and 36 is:

Correct option is C

Given:
24 and 36 are the first and middle proportions respectively.
Formula Used:
If A : B :: C : D then, (A × D) = (B × C)
Solution:
Let the third proportion be x
=> 24 : 36 :: 36 : x
24 × x = 36 × 36
=> x =$$\frac{1296}{24}$$​​
=> x = 54