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    Question

    Determine the fourth proportion for 20, 25, and

    40.
    A 16 Correct Answer Incorrect Answer
    B 22 Correct Answer Incorrect Answer
    C 28 Correct Answer Incorrect Answer
    D 50 Correct Answer Incorrect Answer

    Solution

    ATQ,

    Fourth proportion of numbers a, b, and c is:

    d = (b ├Ч c) / a

    Let the required fourth proportion be d.

    (20 / 25) = (40 / d)

    d = (25 ├Ч 40) / 20

    d = 1000 / 20 = 50

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