Finding the Fourth Proportional to 21,138,553.74, 29,169,423.36 and 11,719,596.72
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Solution
The fourth proportional to 21,138,553.74, 29,169,423.36 and 11,719,596.72 is: 16,172,056.17
Step by Step Solution
- Step 1: Write the proportion equation
21,138,553.74 : 29,169,423.36 = 11,719,596.72 : x - Step 2: Convert to fraction form
21,138,553.74/29,169,423.36 = 11,719,596.72/x - Step 3: Cross multiply
21,138,553.74x = 29,169,423.36 × 11,719,596.72 - Step 4: Simplify right side
21,138,553.74x = 341,853,878,334,147.38 - Step 5: Solve for x
x = 341,853,878,334,147.38/21,138,553.74 - Step 6: Final answer
x = 16,172,056.17
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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.