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Finding the Third Proportional to 18,309 and 27,391.50

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Solution

The third proportional to 18,309 and 27,391.50 is: 40,979.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,309 : 27,391.50 = 27,391.50 : x
  2. Step 2: Convert to fraction form
    18,309/27,391.50 = 27,391.50/x
  3. Step 3: Cross multiply
    18,309x = 27,391.50 × 27,391.50
  4. Step 4: Simplify right side
    18,309x = 750,294,272.25
  5. Step 5: Solve for x
    x = 750,294,272.25/18,309
  6. Step 6: Final answer
    x = 40,979.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.