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Finding the Third Proportional to 3,939 and 9,150

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Solution

The third proportional to 3,939 and 9,150 is: 21,254.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939 : 9,150 = 9,150 : x
  2. Step 2: Convert to fraction form
    3,939/9,150 = 9,150/x
  3. Step 3: Cross multiply
    3,939x = 9,150 × 9,150
  4. Step 4: Simplify right side
    3,939x = 83,722,500
  5. Step 5: Solve for x
    x = 83,722,500/3,939
  6. Step 6: Final answer
    x = 21,254.76

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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.