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Finding the Third Proportional to 18,116 and 38,920

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Solution

The third proportional to 18,116 and 38,920 is: 83,614.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,116 : 38,920 = 38,920 : x
  2. Step 2: Convert to fraction form
    18,116/38,920 = 38,920/x
  3. Step 3: Cross multiply
    18,116x = 38,920 × 38,920
  4. Step 4: Simplify right side
    18,116x = 1,514,766,400
  5. Step 5: Solve for x
    x = 1,514,766,400/18,116
  6. Step 6: Final answer
    x = 83,614.84

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.