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Finding the Third Proportional to 3,158 and 6,940

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Solution

The third proportional to 3,158 and 6,940 is: 15,251.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,158 : 6,940 = 6,940 : x
  2. Step 2: Convert to fraction form
    3,158/6,940 = 6,940/x
  3. Step 3: Cross multiply
    3,158x = 6,940 × 6,940
  4. Step 4: Simplify right side
    3,158x = 48,163,600
  5. Step 5: Solve for x
    x = 48,163,600/3,158
  6. Step 6: Final answer
    x = 15,251.30

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.