The fourth ratio of 12, 24, and 27 is the same as the third ratio of A and 36. What is the value of A?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 24.
Formula used:
Fourth proportion of a, b, and c is x then
x = bc/a ---- (1)
Third proportion of a, b is y then
y = b2/a ---- (2)
Calculations:
Equating: equation (1) = equation (2)
⇒ (27 × 24)/12 = (36 × 36)/A
⇒ A = 24