RRB NTPC · Find Fourth Proportional

Exercise and reference answers

Matching pairs

1. Left

   2 : 4 :: 6 : x

   Right

   x = 12

2. Left

   3 : 9 :: 5 : x

   Right

   x = 15

3. Left

   5 : 15 :: 2 : x

   Right

   x = 6

4. Left

   4 : 8 :: 7 : x

   Right

   x = 14

Instructions

Match a : b :: c : x to the missing value x