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Finding the Third Proportional to 3,612 and 7,800

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Solution

The third proportional to 3,612 and 7,800 is: 16,843.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,612 : 7,800 = 7,800 : x
  2. Step 2: Convert to fraction form
    3,612/7,800 = 7,800/x
  3. Step 3: Cross multiply
    3,612x = 7,800 × 7,800
  4. Step 4: Simplify right side
    3,612x = 60,840,000
  5. Step 5: Solve for x
    x = 60,840,000/3,612
  6. Step 6: Final answer
    x = 16,843.85

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.