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The Fourth Proportional to 5, 8, 15 is - Mathematics

MCQ

The fourth proportional to 5, 8, 15 is

Options

  • 18

  • 24

  • 19

  • 20

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Solution

24
Explanation:
Let the fourth proportional to 5, 8, 15 be x.
Then, `5:8::15:x`
⇒ `5x=(8xx15)`

⇒ `x=((8xx15))/5=24`

Concept: Ratio and Proportion (Entrance Exam)
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