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Finding the Third Proportional to 3,118 and 7,318

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Solution

The third proportional to 3,118 and 7,318 is: 17,175.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,118 : 7,318 = 7,318 : x
  2. Step 2: Convert to fraction form
    3,118/7,318 = 7,318/x
  3. Step 3: Cross multiply
    3,118x = 7,318 × 7,318
  4. Step 4: Simplify right side
    3,118x = 53,553,124
  5. Step 5: Solve for x
    x = 53,553,124/3,118
  6. Step 6: Final answer
    x = 17,175.47

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Why These Related Problems?

These problems maintain the same ratio (2.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.