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Finding the Third Proportional to 7,698 and 11,939

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Solution

The third proportional to 7,698 and 11,939 is: 18,516.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,698 : 11,939 = 11,939 : x
  2. Step 2: Convert to fraction form
    7,698/11,939 = 11,939/x
  3. Step 3: Cross multiply
    7,698x = 11,939 × 11,939
  4. Step 4: Simplify right side
    7,698x = 142,539,721
  5. Step 5: Solve for x
    x = 142,539,721/7,698
  6. Step 6: Final answer
    x = 18,516.46

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.