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Finding the Third Proportional to 18,487 and 40,660

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Solution

The third proportional to 18,487 and 40,660 is: 89,426.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,487 : 40,660 = 40,660 : x
  2. Step 2: Convert to fraction form
    18,487/40,660 = 40,660/x
  3. Step 3: Cross multiply
    18,487x = 40,660 × 40,660
  4. Step 4: Simplify right side
    18,487x = 1,653,235,600
  5. Step 5: Solve for x
    x = 1,653,235,600/18,487
  6. Step 6: Final answer
    x = 89,426.93

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.