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Finding the Third Proportional to 25,690 and 38,720

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Solution

The third proportional to 25,690 and 38,720 is: 58,358.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,690 : 38,720 = 38,720 : x
  2. Step 2: Convert to fraction form
    25,690/38,720 = 38,720/x
  3. Step 3: Cross multiply
    25,690x = 38,720 × 38,720
  4. Step 4: Simplify right side
    25,690x = 1,499,238,400
  5. Step 5: Solve for x
    x = 1,499,238,400/25,690
  6. Step 6: Final answer
    x = 58,358.83

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.