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Finding the Third Proportional to 18,009 and 39,291.75

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Solution

The third proportional to 18,009 and 39,291.75 is: 85,726.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,009 : 39,291.75 = 39,291.75 : x
  2. Step 2: Convert to fraction form
    18,009/39,291.75 = 39,291.75/x
  3. Step 3: Cross multiply
    18,009x = 39,291.75 × 39,291.75
  4. Step 4: Simplify right side
    18,009x = 1,543,841,618.06
  5. Step 5: Solve for x
    x = 1,543,841,618.06/18,009
  6. Step 6: Final answer
    x = 85,726.12

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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.