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Finding the Third Proportional to 5,642 and 8,199

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Solution

The third proportional to 5,642 and 8,199 is: 11,914.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,642 : 8,199 = 8,199 : x
  2. Step 2: Convert to fraction form
    5,642/8,199 = 8,199/x
  3. Step 3: Cross multiply
    5,642x = 8,199 × 8,199
  4. Step 4: Simplify right side
    5,642x = 67,223,601
  5. Step 5: Solve for x
    x = 67,223,601/5,642
  6. Step 6: Final answer
    x = 11,914.85

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.