Finding the Fourth Proportional to 21,163,951.17, 29,207,213.15 and 12,462,490.53
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Solution
The fourth proportional to 21,163,951.17, 29,207,213.15 and 12,462,490.53 is: 17,198,802.54
Step by Step Solution
- Step 1: Write the proportion equation
21,163,951.17 : 29,207,213.15 = 12,462,490.53 : x - Step 2: Convert to fraction form
21,163,951.17/29,207,213.15 = 12,462,490.53/x - Step 3: Cross multiply
21,163,951.17x = 29,207,213.15 × 12,462,490.53 - Step 4: Simplify right side
21,163,951.17x = 363,994,617,227,254 - Step 5: Solve for x
x = 363,994,617,227,254/21,163,951.17 - Step 6: Final answer
x = 17,198,802.54
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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.