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Finding the Third Proportional to 6,422 and 7,042

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Solution

The third proportional to 6,422 and 7,042 is: 7,721.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,422 : 7,042 = 7,042 : x
  2. Step 2: Convert to fraction form
    6,422/7,042 = 7,042/x
  3. Step 3: Cross multiply
    6,422x = 7,042 × 7,042
  4. Step 4: Simplify right side
    6,422x = 49,589,764
  5. Step 5: Solve for x
    x = 49,589,764/6,422
  6. Step 6: Final answer
    x = 7,721.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.