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Find the fourth proportion of 5, 8, 10?
  1. 16
  2. 18
  3. 20
  4. None of these
Explanation

For fourth proportion: a : b = c : d

5 : 8 = 10 : x

5/8 = 10/x

5x = 80

x = 16


Last verified on 06-10-2026

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