what number must be added to each of the number 18 20 21 24 to get the number which are in proportion
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But they r in which proportion
Mention that also in the q
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Call the one value to be added by some name; say, “x”. Then we need x to create a true proportional statement; namely:
5+x9+x=13+x21+x
5+x9+x=13+x21+x
Cross-Multiply to get a quadratic equation:
105+26x+x2=117+22x+x2
105+26x+x2=117+22x+x2
Subtract the identical squared term from either side. Then solve the resulting linear equation for the value that must be added.
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