what is the forth proportional of 12,21,8 and how?
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12,21,8
let x be the 4th proportional
therefore, 22,21,8,x are in proportion
i.e. 12÷21=8÷x
therefore ,
12×X = 21×8
12x=168
x=168÷12
x=14
therefore the fourth proportional is 14
let x be the 4th proportional
therefore, 22,21,8,x are in proportion
i.e. 12÷21=8÷x
therefore ,
12×X = 21×8
12x=168
x=168÷12
x=14
therefore the fourth proportional is 14
lordofhell564:
thank u sir
u are wlc
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