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Railways PYQCBT 2 2017

RRB NTPC · Question 36

What is the fourth proportional to 14, 6, 28 ?

  1. 12

  2. 3

  3. 7

  4. 6

Show answer & explanation

Answer: (A) 12

Explanation

The fourth proportional x satisfies 14 : 6 = 28 : x, so x = 6 × 28/14 = 12.