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Finding the Third Proportional to 5,128.31 and 11,005.88

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Solution

The third proportional to 5,128.31 and 11,005.88 is: 23,619.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.31 : 11,005.88 = 11,005.88 : x
  2. Step 2: Convert to fraction form
    5,128.31/11,005.88 = 11,005.88/x
  3. Step 3: Cross multiply
    5,128.31x = 11,005.88 × 11,005.88
  4. Step 4: Simplify right side
    5,128.31x = 121,129,284.52
  5. Step 5: Solve for x
    x = 121,129,284.52/5,128.31
  6. Step 6: Final answer
    x = 23,619.72

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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.