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Finding the Third Proportional to 20,841 and 28,315

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Solution

The third proportional to 20,841 and 28,315 is: 38,469.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,841 : 28,315 = 28,315 : x
  2. Step 2: Convert to fraction form
    20,841/28,315 = 28,315/x
  3. Step 3: Cross multiply
    20,841x = 28,315 × 28,315
  4. Step 4: Simplify right side
    20,841x = 801,739,225
  5. Step 5: Solve for x
    x = 801,739,225/20,841
  6. Step 6: Final answer
    x = 38,469.33

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.