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Finding the Third Proportional to 8,730 and 12,681

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Solution

The third proportional to 8,730 and 12,681 is: 18,420.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,730 : 12,681 = 12,681 : x
  2. Step 2: Convert to fraction form
    8,730/12,681 = 12,681/x
  3. Step 3: Cross multiply
    8,730x = 12,681 × 12,681
  4. Step 4: Simplify right side
    8,730x = 160,807,761
  5. Step 5: Solve for x
    x = 160,807,761/8,730
  6. Step 6: Final answer
    x = 18,420.13

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.