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Finding the Third Proportional to 8,631.50 and 18,493

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Solution

The third proportional to 8,631.50 and 18,493 is: 39,621.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,631.50 : 18,493 = 18,493 : x
  2. Step 2: Convert to fraction form
    8,631.50/18,493 = 18,493/x
  3. Step 3: Cross multiply
    8,631.50x = 18,493 × 18,493
  4. Step 4: Simplify right side
    8,631.50x = 341,991,049
  5. Step 5: Solve for x
    x = 341,991,049/8,631.50
  6. Step 6: Final answer
    x = 39,621.28

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.