Question

(i) 12 : 30 = 8:x
(iv) 21 : 12 : :x: 8
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Answer 1

Answer:

(i) 12 : 30 = 8 : x

12 × 30 = 8 × x

12 × 30 / 8 = x

360 / 8 = x

45 = x

(iv) 21 : 12 : : x : 8

Product of Means = 12 × x

Product of Extremes = 21 × 8 = 168

Product of Means = Product of Extremes

12 × x = 168

x = 168 = 14

12