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Finding the Third Proportional to 6.20 and 13.20

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Solution

The third proportional to 6.20 and 13.20 is: 28.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    6.20 : 13.20 = 13.20 : x
  2. Step 2: Convert to fraction form
    6.20/13.20 = 13.20/x
  3. Step 3: Cross multiply
    6.20x = 13.20 × 13.20
  4. Step 4: Simplify right side
    6.20x = 174.32
  5. Step 5: Solve for x
    x = 174.32/6.20
  6. Step 6: Final answer
    x = 28.11

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.