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Finding the Third Proportional to 8,691.47 and 18,985.22

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Solution

The third proportional to 8,691.47 and 18,985.22 is: 41,470.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,691.47 : 18,985.22 = 18,985.22 : x
  2. Step 2: Convert to fraction form
    8,691.47/18,985.22 = 18,985.22/x
  3. Step 3: Cross multiply
    8,691.47x = 18,985.22 × 18,985.22
  4. Step 4: Simplify right side
    8,691.47x = 360,438,530.99
  5. Step 5: Solve for x
    x = 360,438,530.99/8,691.47
  6. Step 6: Final answer
    x = 41,470.38

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.