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Finding the Third Proportional to 3,894 and 8,436

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Solution

The third proportional to 3,894 and 8,436 is: 18,275.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,894 : 8,436 = 8,436 : x
  2. Step 2: Convert to fraction form
    3,894/8,436 = 8,436/x
  3. Step 3: Cross multiply
    3,894x = 8,436 × 8,436
  4. Step 4: Simplify right side
    3,894x = 71,166,096
  5. Step 5: Solve for x
    x = 71,166,096/3,894
  6. Step 6: Final answer
    x = 18,275.83

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.