Finding the Fourth Proportional to 15,187,809.17, 20,959,232.20 and 8,218,486.79
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Solution
The fourth proportional to 15,187,809.17, 20,959,232.20 and 8,218,486.79 is: 11,341,541.83
Step by Step Solution
- Step 1: Write the proportion equation
15,187,809.17 : 20,959,232.20 = 8,218,486.79 : x - Step 2: Convert to fraction form
15,187,809.17/20,959,232.20 = 8,218,486.79/x - Step 3: Cross multiply
15,187,809.17x = 20,959,232.20 × 8,218,486.79 - Step 4: Simplify right side
15,187,809.17x = 172,253,172,964,242.62 - Step 5: Solve for x
x = 172,253,172,964,242.62/15,187,809.17 - Step 6: Final answer
x = 11,341,541.83
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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.