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Finding the Third Proportional to 20,128.50 and 27,438.75

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Solution

The third proportional to 20,128.50 and 27,438.75 is: 37,403.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.50 : 27,438.75 = 27,438.75 : x
  2. Step 2: Convert to fraction form
    20,128.50/27,438.75 = 27,438.75/x
  3. Step 3: Cross multiply
    20,128.50x = 27,438.75 × 27,438.75
  4. Step 4: Simplify right side
    20,128.50x = 752,885,001.56
  5. Step 5: Solve for x
    x = 752,885,001.56/20,128.50
  6. Step 6: Final answer
    x = 37,403.93

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.