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Finding the Third Proportional to 5,272 and 8,189

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Solution

The third proportional to 5,272 and 8,189 is: 12,719.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,272 : 8,189 = 8,189 : x
  2. Step 2: Convert to fraction form
    5,272/8,189 = 8,189/x
  3. Step 3: Cross multiply
    5,272x = 8,189 × 8,189
  4. Step 4: Simplify right side
    5,272x = 67,059,721
  5. Step 5: Solve for x
    x = 67,059,721/5,272
  6. Step 6: Final answer
    x = 12,719.98

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.