Finding the Fourth Proportional to 18,120,900.68, 25,006,847.16 and 9,972,138.68
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Solution
The fourth proportional to 18,120,900.68, 25,006,847.16 and 9,972,138.68 is: 13,761,553.70
Step by Step Solution
- Step 1: Write the proportion equation
18,120,900.68 : 25,006,847.16 = 9,972,138.68 : x - Step 2: Convert to fraction form
18,120,900.68/25,006,847.16 = 9,972,138.68/x - Step 3: Cross multiply
18,120,900.68x = 25,006,847.16 × 9,972,138.68 - Step 4: Simplify right side
18,120,900.68x = 249,371,747,829,084.16 - Step 5: Solve for x
x = 249,371,747,829,084.16/18,120,900.68 - Step 6: Final answer
x = 13,761,553.70
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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.