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Finding the Third Proportional to 18,512 and 39,940

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Solution

The third proportional to 18,512 and 39,940 is: 86,171.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,512 : 39,940 = 39,940 : x
  2. Step 2: Convert to fraction form
    18,512/39,940 = 39,940/x
  3. Step 3: Cross multiply
    18,512x = 39,940 × 39,940
  4. Step 4: Simplify right side
    18,512x = 1,595,203,600
  5. Step 5: Solve for x
    x = 1,595,203,600/18,512
  6. Step 6: Final answer
    x = 86,171.33

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.