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Finding the Third Proportional to 13,217 and 20,489.50

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Solution

The third proportional to 13,217 and 20,489.50 is: 31,763.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,217 : 20,489.50 = 20,489.50 : x
  2. Step 2: Convert to fraction form
    13,217/20,489.50 = 20,489.50/x
  3. Step 3: Cross multiply
    13,217x = 20,489.50 × 20,489.50
  4. Step 4: Simplify right side
    13,217x = 419,819,610.25
  5. Step 5: Solve for x
    x = 419,819,610.25/13,217
  6. Step 6: Final answer
    x = 31,763.61

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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.