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Finding the Third Proportional to 5.50 and 11.75

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Solution

The third proportional to 5.50 and 11.75 is: 25.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.50 : 11.75 = 11.75 : x
  2. Step 2: Convert to fraction form
    5.50/11.75 = 11.75/x
  3. Step 3: Cross multiply
    5.50x = 11.75 × 11.75
  4. Step 4: Simplify right side
    5.50x = 138.06
  5. Step 5: Solve for x
    x = 138.06/5.50
  6. Step 6: Final answer
    x = 25.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.