Find the value of x if i-) 21:27::3.5:x ii-)10/3:x::5/2:5/4

Answers (1)

i-) Using cross product rule,we get
    21	imes x=27	imes3.5           (Product of means=Product of extremes)
 Rightarrow x=frac27	imes3.521=frac9	imes3.57=9	imes0.5=4.5
ii-) Given 
   frac103:x=frac52:frac54
  Using cross product rule,we get       (Product of means=Product of extremes)
  x	imesfrac52=frac103	imesfrac54
  x=frac103	imesfrac54	imesfrac25=frac53=1	frac23

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