Finding the Fourth Proportional to 21,427,072.70, 29,564,760.04 and 12,728,178.14
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Solution
The fourth proportional to 21,427,072.70, 29,564,760.04 and 12,728,178.14 is: 17,562,153.15
Step by Step Solution
- Step 1: Write the proportion equation
21,427,072.70 : 29,564,760.04 = 12,728,178.14 : x - Step 2: Convert to fraction form
21,427,072.70/29,564,760.04 = 12,728,178.14/x - Step 3: Cross multiply
21,427,072.70x = 29,564,760.04 × 12,728,178.14 - Step 4: Simplify right side
21,427,072.70x = 376,305,532,275,829.31 - Step 5: Solve for x
x = 376,305,532,275,829.31/21,427,072.70 - Step 6: Final answer
x = 17,562,153.15
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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.