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Finding the Third Proportional to 5,407 and 8,349

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Solution

The third proportional to 5,407 and 8,349 is: 12,891.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,407 : 8,349 = 8,349 : x
  2. Step 2: Convert to fraction form
    5,407/8,349 = 8,349/x
  3. Step 3: Cross multiply
    5,407x = 8,349 × 8,349
  4. Step 4: Simplify right side
    5,407x = 69,705,801
  5. Step 5: Solve for x
    x = 69,705,801/5,407
  6. Step 6: Final answer
    x = 12,891.77

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.