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Finding the Third Proportional to 13,869.56 and 20,781.56

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Solution

The third proportional to 13,869.56 and 20,781.56 is: 31,138.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,869.56 : 20,781.56 = 20,781.56 : x
  2. Step 2: Convert to fraction form
    13,869.56/20,781.56 = 20,781.56/x
  3. Step 3: Cross multiply
    13,869.56x = 20,781.56 × 20,781.56
  4. Step 4: Simplify right side
    13,869.56x = 431,873,339.94
  5. Step 5: Solve for x
    x = 431,873,339.94/13,869.56
  6. Step 6: Final answer
    x = 31,138.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.