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Finding the Third Proportional to 11.57 and 15.53

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Solution

The third proportional to 11.57 and 15.53 is: 20.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    11.57 : 15.53 = 15.53 : x
  2. Step 2: Convert to fraction form
    11.57/15.53 = 15.53/x
  3. Step 3: Cross multiply
    11.57x = 15.53 × 15.53
  4. Step 4: Simplify right side
    11.57x = 241.06
  5. Step 5: Solve for x
    x = 241.06/11.57
  6. Step 6: Final answer
    x = 20.84

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.