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Finding the Third Proportional to 3,902 and 6,988

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Solution

The third proportional to 3,902 and 6,988 is: 12,514.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,902 : 6,988 = 6,988 : x
  2. Step 2: Convert to fraction form
    3,902/6,988 = 6,988/x
  3. Step 3: Cross multiply
    3,902x = 6,988 × 6,988
  4. Step 4: Simplify right side
    3,902x = 48,832,144
  5. Step 5: Solve for x
    x = 48,832,144/3,902
  6. Step 6: Final answer
    x = 12,514.64

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Why These Related Problems?

These problems maintain the same ratio (1.79) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.