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Finding the Third Proportional to 8,939 and 20,783

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Solution

The third proportional to 8,939 and 20,783 is: 48,320.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,939 : 20,783 = 20,783 : x
  2. Step 2: Convert to fraction form
    8,939/20,783 = 20,783/x
  3. Step 3: Cross multiply
    8,939x = 20,783 × 20,783
  4. Step 4: Simplify right side
    8,939x = 431,933,089
  5. Step 5: Solve for x
    x = 431,933,089/8,939
  6. Step 6: Final answer
    x = 48,320.07

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Why These Related Problems?

These problems maintain the same ratio (2.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.