Finding the Fourth Proportional to 15,187,813.99, 20,959,238.86 and 8,218,491.60
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Solution
The fourth proportional to 15,187,813.99, 20,959,238.86 and 8,218,491.60 is: 11,341,548.47
Step by Step Solution
- Step 1: Write the proportion equation
15,187,813.99 : 20,959,238.86 = 8,218,491.60 : x - Step 2: Convert to fraction form
15,187,813.99/20,959,238.86 = 8,218,491.60/x - Step 3: Cross multiply
15,187,813.99x = 20,959,238.86 × 8,218,491.60 - Step 4: Simplify right side
15,187,813.99x = 172,253,328,492,757.34 - Step 5: Solve for x
x = 172,253,328,492,757.34/15,187,813.99 - Step 6: Final answer
x = 11,341,548.47
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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.