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Finding the Third Proportional to 5,115.25 and 7,899

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Solution

The third proportional to 5,115.25 and 7,899 is: 12,197.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.25 : 7,899 = 7,899 : x
  2. Step 2: Convert to fraction form
    5,115.25/7,899 = 7,899/x
  3. Step 3: Cross multiply
    5,115.25x = 7,899 × 7,899
  4. Step 4: Simplify right side
    5,115.25x = 62,394,201
  5. Step 5: Solve for x
    x = 62,394,201/5,115.25
  6. Step 6: Final answer
    x = 12,197.68

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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.