SSC GD 2021 PYQ — Question 58

The correct answer is option 2 i.e. 8

Concept used:

If a : b :: c : d then (a × d) = (b × c)

Calculations:

Let the third proportional be x

According to the question;

The proportion = 18 : 12 :: 12 : x

⇒ 18 × x = 12 × 12

⇒ x = 144/18

⇒ x = 8