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Finding the Third Proportional to 8,218 and 15,422

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Solution

The third proportional to 8,218 and 15,422 is: 28,941.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,218 : 15,422 = 15,422 : x
  2. Step 2: Convert to fraction form
    8,218/15,422 = 15,422/x
  3. Step 3: Cross multiply
    8,218x = 15,422 × 15,422
  4. Step 4: Simplify right side
    8,218x = 237,838,084
  5. Step 5: Solve for x
    x = 237,838,084/8,218
  6. Step 6: Final answer
    x = 28,941.12

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Why These Related Problems?

These problems maintain the same ratio (1.88) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.