The fourth proportional to 5, 8, 15 is: Option 1: 18 Option 2: 24 Option 3: 19 Option 4: 20

Answer: 24. Solution: For fourth proportional x: 5 : 8 = 15 : x, so 5x = 8 x 15 = 120, giving x = 24.

Arithmetic

Ratio, Proportion & Variation

Easy

The fourth proportional to 5, 8, 15 is:

✅ Correct Option: 2

For fourth proportional $x$ : $5 : 8 = 15 : x$ , so $5x = 8 \times 15 = 120$ , giving $x = 24$ .

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The fourth proportional to 5, 8, 15 is:

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