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    Question

    Find the fourth proportion of 12.5, 17.5 and 27

    respectively.
    A 34.4 Correct Answer Incorrect Answer
    B 37.8 Correct Answer Incorrect Answer
    C 38.8 Correct Answer Incorrect Answer
    D 32.5 Correct Answer Incorrect Answer

    Solution

    Let the fourth proportion be 'k'.12.5:17.5:27:kSo, 12.5 X k = 17.5 X 27Or, 'k' = (17.5 X 27) ÷ 12.5 = 37.8

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