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Finding the Third Proportional to 8,128.50 and 11,040.75

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Solution

The third proportional to 8,128.50 and 11,040.75 is: 14,996.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128.50 : 11,040.75 = 11,040.75 : x
  2. Step 2: Convert to fraction form
    8,128.50/11,040.75 = 11,040.75/x
  3. Step 3: Cross multiply
    8,128.50x = 11,040.75 × 11,040.75
  4. Step 4: Simplify right side
    8,128.50x = 121,898,160.56
  5. Step 5: Solve for x
    x = 121,898,160.56/8,128.50
  6. Step 6: Final answer
    x = 14,996.39

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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.