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Finding the Third Proportional to 12,717 and 20,425.50

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Solution

The third proportional to 12,717 and 20,425.50 is: 32,806.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,717 : 20,425.50 = 20,425.50 : x
  2. Step 2: Convert to fraction form
    12,717/20,425.50 = 20,425.50/x
  3. Step 3: Cross multiply
    12,717x = 20,425.50 × 20,425.50
  4. Step 4: Simplify right side
    12,717x = 417,201,050.25
  5. Step 5: Solve for x
    x = 417,201,050.25/12,717
  6. Step 6: Final answer
    x = 32,806.56

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.