Finding the Fourth Proportional to 12,257,755.20, 18,358,639.20 and 7,218,907.20
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Solution
The fourth proportional to 12,257,755.20, 18,358,639.20 and 7,218,907.20 is: 10,811,874.65
Step by Step Solution
- Step 1: Write the proportion equation
12,257,755.20 : 18,358,639.20 = 7,218,907.20 : x - Step 2: Convert to fraction form
12,257,755.20/18,358,639.20 = 7,218,907.20/x - Step 3: Cross multiply
12,257,755.20x = 18,358,639.20 × 7,218,907.20 - Step 4: Simplify right side
12,257,755.20x = 132,529,312,703,082.23 - Step 5: Solve for x
x = 132,529,312,703,082.23/12,257,755.20 - Step 6: Final answer
x = 10,811,874.65
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.