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Finding the Third Proportional to 3,638 and 6,898

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Solution

The third proportional to 3,638 and 6,898 is: 13,079.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,638 : 6,898 = 6,898 : x
  2. Step 2: Convert to fraction form
    3,638/6,898 = 6,898/x
  3. Step 3: Cross multiply
    3,638x = 6,898 × 6,898
  4. Step 4: Simplify right side
    3,638x = 47,582,404
  5. Step 5: Solve for x
    x = 47,582,404/3,638
  6. Step 6: Final answer
    x = 13,079.28

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Why These Related Problems?

These problems maintain the same ratio (1.90) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.