Mathematics
Grade9
Easy

Question

Find the value of x.
1 half equals x over 10

  1. 5
  2. 20
  3. 10
  4. 15

hintHint:

For every proportion, the product of the extremes is always equal to the product of the means, i.e., a : b : : c : d if and only if ad = bc.
For example; in proportion 3 : 4 : : 9 : 12;
Product of extremes = 3 × 12 = 36 and product of means = 4 × 9 = 36

The correct answer is: 5


    For every proportion, the product of the extremes is always equal to the product of the means, i.e., a : b : : c : d if and only if ad = bc.
     1 half equals x over 10
    Product of extremes = product of means
    cross times10 = 2 cross timesx
    2x = 10
    x = 5
    Thus, the value of x is 5.

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