Question

find 7:x::x:28.find x.

aswer is 14
solve

Answer 1

the ans. 14
7:x::x:28 means ,
7/x = x/24
put x=14. means,
7/14=x /28
= 7 × 28 / 14x
{ x = 14 }

Answer 2

QUESTION ---- find 7:x::x:28.find x.

ANSWER
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7 : x :: x : 28

This is known as Continuous Proportion

If there exist a continuous proportion
a : b :: b : c

Then, b = √ (a × c)

You can derive this formula by using
Product of means = Product of extremes
by which b square = ac
=> b = √(ac)

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USING THE ABOVE STATED FORMULA

7 : x :: x : 28

x = √ ( 7 × 28 )

x = √196

=> x = 14

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ANSWER = 14
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HOPE IT HELPS :):):):):):):)