Find the third proportional to Rs. 3, Rs. 12

Sum

Let x be the third proportional to Rs. 3 and Rs. 12
then Rs. 3 : Rs. 12 : : Rs. 12 : x
∴ x = `(12 xx 12)/(3)`
= 48
∴ Third proportional = Rs. 48.

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Chapter 6: Ratio and Proportion - Exercise 7.2

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