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Finding the Third Proportional to 20,180 and 31,375

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Solution

The third proportional to 20,180 and 31,375 is: 48,780.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,180 : 31,375 = 31,375 : x
  2. Step 2: Convert to fraction form
    20,180/31,375 = 31,375/x
  3. Step 3: Cross multiply
    20,180x = 31,375 × 31,375
  4. Step 4: Simplify right side
    20,180x = 984,390,625
  5. Step 5: Solve for x
    x = 984,390,625/20,180
  6. Step 6: Final answer
    x = 48,780.51

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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.