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Finding the Third Proportional to 8,120 and 12,812

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Solution

The third proportional to 8,120 and 12,812 is: 20,215.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,120 : 12,812 = 12,812 : x
  2. Step 2: Convert to fraction form
    8,120/12,812 = 12,812/x
  3. Step 3: Cross multiply
    8,120x = 12,812 × 12,812
  4. Step 4: Simplify right side
    8,120x = 164,147,344
  5. Step 5: Solve for x
    x = 164,147,344/8,120
  6. Step 6: Final answer
    x = 20,215.19

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.