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Finding the Third Proportional to 20,612 and 39,580

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Solution

The third proportional to 20,612 and 39,580 is: 76,003.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,612 : 39,580 = 39,580 : x
  2. Step 2: Convert to fraction form
    20,612/39,580 = 39,580/x
  3. Step 3: Cross multiply
    20,612x = 39,580 × 39,580
  4. Step 4: Simplify right side
    20,612x = 1,566,576,400
  5. Step 5: Solve for x
    x = 1,566,576,400/20,612
  6. Step 6: Final answer
    x = 76,003.12

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Why These Related Problems?

These problems maintain the same ratio (1.92) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.