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Finding the Third Proportional to 5,128.78 and 11,042.25

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Solution

The third proportional to 5,128.78 and 11,042.25 is: 23,773.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.78 : 11,042.25 = 11,042.25 : x
  2. Step 2: Convert to fraction form
    5,128.78/11,042.25 = 11,042.25/x
  3. Step 3: Cross multiply
    5,128.78x = 11,042.25 × 11,042.25
  4. Step 4: Simplify right side
    5,128.78x = 121,931,285.06
  5. Step 5: Solve for x
    x = 121,931,285.06/5,128.78
  6. Step 6: Final answer
    x = 23,773.93

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.