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Finding the Third Proportional to 18,651.75 and 38,166

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Solution

The third proportional to 18,651.75 and 38,166 is: 78,096.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,651.75 : 38,166 = 38,166 : x
  2. Step 2: Convert to fraction form
    18,651.75/38,166 = 38,166/x
  3. Step 3: Cross multiply
    18,651.75x = 38,166 × 38,166
  4. Step 4: Simplify right side
    18,651.75x = 1,456,643,556
  5. Step 5: Solve for x
    x = 1,456,643,556/18,651.75
  6. Step 6: Final answer
    x = 78,096.88

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.