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Finding the Third Proportional to 7,128 and 15,481.13

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Solution

The third proportional to 7,128 and 15,481.13 is: 33,623.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128 : 15,481.13 = 15,481.13 : x
  2. Step 2: Convert to fraction form
    7,128/15,481.13 = 15,481.13/x
  3. Step 3: Cross multiply
    7,128x = 15,481.13 × 15,481.13
  4. Step 4: Simplify right side
    7,128x = 239,665,231.27
  5. Step 5: Solve for x
    x = 239,665,231.27/7,128
  6. Step 6: Final answer
    x = 33,623.07

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.