English

The fourth proportional to 5, 8, 15 is ______.

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Question

The fourth proportional to 5, 8, 15 is ______.

Options

  • 18

  • 20

  • 21

  • 24

MCQ
Fill in the Blanks
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Solution

The fourth proportional to 5, 8, 15 is 24.

Explanation:

If the fourth proportional is d, then 5 : 8 = 15 : d.

Hence `d = 8 xx 15/5 = 24`.

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Chapter 7: Ratio and Proportion - COMPETENCY-FOCUSED QUESTIONS [Page 114]

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R.S. Aggarwal Mathematics [English] Class 10 ICSE
Chapter 7 Ratio and Proportion
COMPETENCY-FOCUSED QUESTIONS | Q 14. | Page 114
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