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Finding the Third Proportional to 7,140.66 and 11,100.80

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Solution

The third proportional to 7,140.66 and 11,100.80 is: 17,257.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,140.66 : 11,100.80 = 11,100.80 : x
  2. Step 2: Convert to fraction form
    7,140.66/11,100.80 = 11,100.80/x
  3. Step 3: Cross multiply
    7,140.66x = 11,100.80 × 11,100.80
  4. Step 4: Simplify right side
    7,140.66x = 123,227,691.26
  5. Step 5: Solve for x
    x = 123,227,691.26/7,140.66
  6. Step 6: Final answer
    x = 17,257.19

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.