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Finding the Third Proportional to 18,407 and 39,868

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Solution

The third proportional to 18,407 and 39,868 is: 86,350.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,407 : 39,868 = 39,868 : x
  2. Step 2: Convert to fraction form
    18,407/39,868 = 39,868/x
  3. Step 3: Cross multiply
    18,407x = 39,868 × 39,868
  4. Step 4: Simplify right side
    18,407x = 1,589,457,424
  5. Step 5: Solve for x
    x = 1,589,457,424/18,407
  6. Step 6: Final answer
    x = 86,350.70

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.