Find the fourth proportional to 20, 24 and 30.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 36 .
Let the fourth proportional be x
20 : 24 :: 30 : x
20 × x = 24 × 30
x = (24 × 30) ÷ 20 = 720 ÷ 20 = 36
SSC GD 2025 PYQ — Question 53
SSC GD Const 2025 (English) - 21 Feb 2025 - Shift 3 • Quantitative Aptitude • Q53