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Finding the Third Proportional to 6.55 and 13.74

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Solution

The third proportional to 6.55 and 13.74 is: 28.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    6.55 : 13.74 = 13.74 : x
  2. Step 2: Convert to fraction form
    6.55/13.74 = 13.74/x
  3. Step 3: Cross multiply
    6.55x = 13.74 × 13.74
  4. Step 4: Simplify right side
    6.55x = 188.78
  5. Step 5: Solve for x
    x = 188.78/6.55
  6. Step 6: Final answer
    x = 28.81

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.