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Finding the Third Proportional to 4,022 and 8,239

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Solution

The third proportional to 4,022 and 8,239 is: 16,877.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,022 : 8,239 = 8,239 : x
  2. Step 2: Convert to fraction form
    4,022/8,239 = 8,239/x
  3. Step 3: Cross multiply
    4,022x = 8,239 × 8,239
  4. Step 4: Simplify right side
    4,022x = 67,881,121
  5. Step 5: Solve for x
    x = 67,881,121/4,022
  6. Step 6: Final answer
    x = 16,877.45

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.