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Finding the Third Proportional to 6,422 and 8,672

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Solution

The third proportional to 6,422 and 8,672 is: 11,710.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,422 : 8,672 = 8,672 : x
  2. Step 2: Convert to fraction form
    6,422/8,672 = 8,672/x
  3. Step 3: Cross multiply
    6,422x = 8,672 × 8,672
  4. Step 4: Simplify right side
    6,422x = 75,203,584
  5. Step 5: Solve for x
    x = 75,203,584/6,422
  6. Step 6: Final answer
    x = 11,710.31

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.