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Finding the Third Proportional to 5,515 and 8,285

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Solution

The third proportional to 5,515 and 8,285 is: 12,446.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,515 : 8,285 = 8,285 : x
  2. Step 2: Convert to fraction form
    5,515/8,285 = 8,285/x
  3. Step 3: Cross multiply
    5,515x = 8,285 × 8,285
  4. Step 4: Simplify right side
    5,515x = 68,641,225
  5. Step 5: Solve for x
    x = 68,641,225/5,515
  6. Step 6: Final answer
    x = 12,446.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.