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Finding the Third Proportional to 8,315 and 12,163

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Solution

The third proportional to 8,315 and 12,163 is: 17,791.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,315 : 12,163 = 12,163 : x
  2. Step 2: Convert to fraction form
    8,315/12,163 = 12,163/x
  3. Step 3: Cross multiply
    8,315x = 12,163 × 12,163
  4. Step 4: Simplify right side
    8,315x = 147,938,569
  5. Step 5: Solve for x
    x = 147,938,569/8,315
  6. Step 6: Final answer
    x = 17,791.77

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.