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Finding the Third Proportional to 8,666.81 and 12,385.13

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Solution

The third proportional to 8,666.81 and 12,385.13 is: 17,698.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,666.81 : 12,385.13 = 12,385.13 : x
  2. Step 2: Convert to fraction form
    8,666.81/12,385.13 = 12,385.13/x
  3. Step 3: Cross multiply
    8,666.81x = 12,385.13 × 12,385.13
  4. Step 4: Simplify right side
    8,666.81x = 153,391,321.27
  5. Step 5: Solve for x
    x = 153,391,321.27/8,666.81
  6. Step 6: Final answer
    x = 17,698.70

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.