RRB NTPC · Question 35
Find the fourth proportional to 14, 28, and 21.
Show answer & explanation
Answer: (B) 42
Explanation
The fourth proportional x satisfies 14 : 28 = 21 : x, so x = 28 × 21/14 = 42.
Railways PYQCBT 2 2017
RRB NTPC · Question 35
Answer: (B) 42
The fourth proportional x satisfies 14 : 28 = 21 : x, so x = 28 × 21/14 = 42.