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Finding the Third Proportional to 11.53 and 25.31

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Solution

The third proportional to 11.53 and 25.31 is: 55.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    11.53 : 25.31 = 25.31 : x
  2. Step 2: Convert to fraction form
    11.53/25.31 = 25.31/x
  3. Step 3: Cross multiply
    11.53x = 25.31 × 25.31
  4. Step 4: Simplify right side
    11.53x = 640.72
  5. Step 5: Solve for x
    x = 640.72/11.53
  6. Step 6: Final answer
    x = 55.56

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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.