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SSC Selection Post 2024 PYQ — Question 56

SSC Selection Post - Matriculation Level - 25 June 2024 - Shift 1 • Quantitative Aptitude • Q56

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Find the third proportional to 5 and 15, which is equal to the fourth proportional of 2, 5, and 18.

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Correct answer: C

Explanation

The correct answer is Option 3 i.e. 45.

Let the third proportional to 5 and 15 be x

⇒ 515=15x{5\over15}={15\over x}

 ⇒ x = 45

Let the fourth proportional of 2, 5, and 18 be y

 ⇒ 25=18y{2\over5}={18\over y}

 ⇒ y = 45

Both values are equal