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Finding the Third Proportional to 18,321 and 39,234

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Solution

The third proportional to 18,321 and 39,234 is: 84,018.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,321 : 39,234 = 39,234 : x
  2. Step 2: Convert to fraction form
    18,321/39,234 = 39,234/x
  3. Step 3: Cross multiply
    18,321x = 39,234 × 39,234
  4. Step 4: Simplify right side
    18,321x = 1,539,306,756
  5. Step 5: Solve for x
    x = 1,539,306,756/18,321
  6. Step 6: Final answer
    x = 84,018.71

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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.