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Finding the Third Proportional to 7,879 and 12,198

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Solution

The third proportional to 7,879 and 12,198 is: 18,884.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,879 : 12,198 = 12,198 : x
  2. Step 2: Convert to fraction form
    7,879/12,198 = 12,198/x
  3. Step 3: Cross multiply
    7,879x = 12,198 × 12,198
  4. Step 4: Simplify right side
    7,879x = 148,791,204
  5. Step 5: Solve for x
    x = 148,791,204/7,879
  6. Step 6: Final answer
    x = 18,884.53

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.