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Finding the Third Proportional to 18,561 and 40,631

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Solution

The third proportional to 18,561 and 40,631 is: 88,943.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,561 : 40,631 = 40,631 : x
  2. Step 2: Convert to fraction form
    18,561/40,631 = 40,631/x
  3. Step 3: Cross multiply
    18,561x = 40,631 × 40,631
  4. Step 4: Simplify right side
    18,561x = 1,650,878,161
  5. Step 5: Solve for x
    x = 1,650,878,161/18,561
  6. Step 6: Final answer
    x = 88,943.38

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.