Finding the Fourth Proportional to 20,639,715.92, 28,482,826.20 and 11,347,444.08
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Solution
The fourth proportional to 20,639,715.92, 28,482,826.20 and 11,347,444.08 is: 15,659,482.85
Step by Step Solution
- Step 1: Write the proportion equation
20,639,715.92 : 28,482,826.20 = 11,347,444.08 : x - Step 2: Convert to fraction form
20,639,715.92/28,482,826.20 = 11,347,444.08/x - Step 3: Cross multiply
20,639,715.92x = 28,482,826.20 × 11,347,444.08 - Step 4: Simplify right side
20,639,715.92x = 323,207,277,502,306 - Step 5: Solve for x
x = 323,207,277,502,306/20,639,715.92 - Step 6: Final answer
x = 15,659,482.85
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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.