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Finding the Third Proportional to 3,980 and 7,348

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Solution

The third proportional to 3,980 and 7,348 is: 13,566.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980 : 7,348 = 7,348 : x
  2. Step 2: Convert to fraction form
    3,980/7,348 = 7,348/x
  3. Step 3: Cross multiply
    3,980x = 7,348 × 7,348
  4. Step 4: Simplify right side
    3,980x = 53,993,104
  5. Step 5: Solve for x
    x = 53,993,104/3,980
  6. Step 6: Final answer
    x = 13,566.11

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Why These Related Problems?

These problems maintain the same ratio (1.85) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.