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Finding the Third Proportional to 11,781.75 and 18,219.38

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Solution

The third proportional to 11,781.75 and 18,219.38 is: 28,174.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,781.75 : 18,219.38 = 18,219.38 : x
  2. Step 2: Convert to fraction form
    11,781.75/18,219.38 = 18,219.38/x
  3. Step 3: Cross multiply
    11,781.75x = 18,219.38 × 18,219.38
  4. Step 4: Simplify right side
    11,781.75x = 331,945,625.39
  5. Step 5: Solve for x
    x = 331,945,625.39/11,781.75
  6. Step 6: Final answer
    x = 28,174.56

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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.