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Finding the Third Proportional to 8,399 and 12,704

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Solution

The third proportional to 8,399 and 12,704 is: 19,215.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,399 : 12,704 = 12,704 : x
  2. Step 2: Convert to fraction form
    8,399/12,704 = 12,704/x
  3. Step 3: Cross multiply
    8,399x = 12,704 × 12,704
  4. Step 4: Simplify right side
    8,399x = 161,391,616
  5. Step 5: Solve for x
    x = 161,391,616/8,399
  6. Step 6: Final answer
    x = 19,215.58

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.