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Finding the Third Proportional to 5,412 and 8,217

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Solution

The third proportional to 5,412 and 8,217 is: 12,475.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,412 : 8,217 = 8,217 : x
  2. Step 2: Convert to fraction form
    5,412/8,217 = 8,217/x
  3. Step 3: Cross multiply
    5,412x = 8,217 × 8,217
  4. Step 4: Simplify right side
    5,412x = 67,519,089
  5. Step 5: Solve for x
    x = 67,519,089/5,412
  6. Step 6: Final answer
    x = 12,475.81

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.