Question

13. If a, b, c and d are in proportion, then

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Answer 1

Step-by-step explanation:

proportion is equality of two ratios.

The ratio of 2 to 3 is same at the ratio of 4+6 ,

ie. 2:3 =4:6

therefore, the two ratios 2:3 & 4:6 are proportionate & written as 2:3: :4:6

and read as the ratio & 2 to 3 is same as that if 2 : 3= 4:6, then 2×6=3×4, 12 = 12,

Let two ratios a:b & c:d be proportionate

i.e. a:b: : c: d

in the proportion a : b : : c : d

product of means product of extreme if a : b= c:d then, a×d=b×c

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