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Finding the Third Proportional to 18,940 and 29,321

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Solution

The third proportional to 18,940 and 29,321 is: 45,391.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,940 : 29,321 = 29,321 : x
  2. Step 2: Convert to fraction form
    18,940/29,321 = 29,321/x
  3. Step 3: Cross multiply
    18,940x = 29,321 × 29,321
  4. Step 4: Simplify right side
    18,940x = 859,721,041
  5. Step 5: Solve for x
    x = 859,721,041/18,940
  6. Step 6: Final answer
    x = 45,391.82

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.