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Finding the Third Proportional to 3,721 and 8,812

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Solution

The third proportional to 3,721 and 8,812 is: 20,868.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,721 : 8,812 = 8,812 : x
  2. Step 2: Convert to fraction form
    3,721/8,812 = 8,812/x
  3. Step 3: Cross multiply
    3,721x = 8,812 × 8,812
  4. Step 4: Simplify right side
    3,721x = 77,651,344
  5. Step 5: Solve for x
    x = 77,651,344/3,721
  6. Step 6: Final answer
    x = 20,868.41

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Why These Related Problems?

These problems maintain the same ratio (2.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.