Which of the following represents a correct proportion ?
A. 12 : 9 :: 16 : 12
B. 13 : 11 :: 5 : 4
C. 30 : 45 :: 13 : 24
D. 3 : 5 :: 2 : 5
Answer: Option A
Solution(By Examveda Team)
a : b :: c : da × d = b × c
So, go through options
(A). 9 × 16 = 12 × 12 (right)
(B). 13 × 4 = 11 × 5 (wrong)
(C). 30 × 24 = 45 × 13 (wrong)
(D). 3 × 5 = 5 × 2 (wrong)
So answer is 12 : 9 :: 16 : 12
This Question Belongs to Arithmetic Ability >> Ratio
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