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Finding the Third Proportional to 8,286 and 18,135

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Solution

The third proportional to 8,286 and 18,135 is: 39,690.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,286 : 18,135 = 18,135 : x
  2. Step 2: Convert to fraction form
    8,286/18,135 = 18,135/x
  3. Step 3: Cross multiply
    8,286x = 18,135 × 18,135
  4. Step 4: Simplify right side
    8,286x = 328,878,225
  5. Step 5: Solve for x
    x = 328,878,225/8,286
  6. Step 6: Final answer
    x = 39,690.83

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.