Finding the Fourth Proportional to 21,615,251.68, 29,824,164.04 and 12,911,720.68
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Solution
The fourth proportional to 21,615,251.68, 29,824,164.04 and 12,911,720.68 is: 17,815,257.55
Step by Step Solution
- Step 1: Write the proportion equation
21,615,251.68 : 29,824,164.04 = 12,911,720.68 : x - Step 2: Convert to fraction form
21,615,251.68/29,824,164.04 = 12,911,720.68/x - Step 3: Cross multiply
21,615,251.68x = 29,824,164.04 × 12,911,720.68 - Step 4: Simplify right side
21,615,251.68x = 385,081,275,598,980.31 - Step 5: Solve for x
x = 385,081,275,598,980.31/21,615,251.68 - Step 6: Final answer
x = 17,815,257.55
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.