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Finding the Third Proportional to 12,976 and 20,069

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Solution

The third proportional to 12,976 and 20,069 is: 31,039.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,976 : 20,069 = 20,069 : x
  2. Step 2: Convert to fraction form
    12,976/20,069 = 20,069/x
  3. Step 3: Cross multiply
    12,976x = 20,069 × 20,069
  4. Step 4: Simplify right side
    12,976x = 402,764,761
  5. Step 5: Solve for x
    x = 402,764,761/12,976
  6. Step 6: Final answer
    x = 31,039.21

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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.