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Finding the Third Proportional to 20,792 and 39,672

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Solution

The third proportional to 20,792 and 39,672 is: 75,695.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,792 : 39,672 = 39,672 : x
  2. Step 2: Convert to fraction form
    20,792/39,672 = 39,672/x
  3. Step 3: Cross multiply
    20,792x = 39,672 × 39,672
  4. Step 4: Simplify right side
    20,792x = 1,573,867,584
  5. Step 5: Solve for x
    x = 1,573,867,584/20,792
  6. Step 6: Final answer
    x = 75,695.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.91) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.