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Finding the Third Proportional to 4,000 and 6,138

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Solution

The third proportional to 4,000 and 6,138 is: 9,418.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,000 : 6,138 = 6,138 : x
  2. Step 2: Convert to fraction form
    4,000/6,138 = 6,138/x
  3. Step 3: Cross multiply
    4,000x = 6,138 × 6,138
  4. Step 4: Simplify right side
    4,000x = 37,675,044
  5. Step 5: Solve for x
    x = 37,675,044/4,000
  6. Step 6: Final answer
    x = 9,418.76

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.