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Finding the Third Proportional to 20,212 and 28,067

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Solution

The third proportional to 20,212 and 28,067 is: 38,974.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,212 : 28,067 = 28,067 : x
  2. Step 2: Convert to fraction form
    20,212/28,067 = 28,067/x
  3. Step 3: Cross multiply
    20,212x = 28,067 × 28,067
  4. Step 4: Simplify right side
    20,212x = 787,756,489
  5. Step 5: Solve for x
    x = 787,756,489/20,212
  6. Step 6: Final answer
    x = 38,974.69

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.