Finding the Fourth Proportional to 20,781,306.60, 28,679,088.78 and 11,613,949.08
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Solution
The fourth proportional to 20,781,306.60, 28,679,088.78 and 11,613,949.08 is: 16,027,744.70
Step by Step Solution
- Step 1: Write the proportion equation
20,781,306.60 : 28,679,088.78 = 11,613,949.08 : x - Step 2: Convert to fraction form
20,781,306.60/28,679,088.78 = 11,613,949.08/x - Step 3: Cross multiply
20,781,306.60x = 28,679,088.78 × 11,613,949.08 - Step 4: Simplify right side
20,781,306.60x = 333,077,476,751,719.31 - Step 5: Solve for x
x = 333,077,476,751,719.31/20,781,306.60 - Step 6: Final answer
x = 16,027,744.70
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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.