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Finding the Third Proportional to 4,238 and 8,917

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Solution

The third proportional to 4,238 and 8,917 is: 18,761.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,238 : 8,917 = 8,917 : x
  2. Step 2: Convert to fraction form
    4,238/8,917 = 8,917/x
  3. Step 3: Cross multiply
    4,238x = 8,917 × 8,917
  4. Step 4: Simplify right side
    4,238x = 79,512,889
  5. Step 5: Solve for x
    x = 79,512,889/4,238
  6. Step 6: Final answer
    x = 18,761.89

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.