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Finding the Fourth Proportional to 13.27, 18.32 and 11.55

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Solution

The fourth proportional to 13.27, 18.32 and 11.55 is: 15.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13.27 : 18.32 = 11.55 : x
  2. Step 2: Convert to fraction form
    13.27/18.32 = 11.55/x
  3. Step 3: Cross multiply
    13.27x = 18.32 × 11.55
  4. Step 4: Simplify right side
    13.27x = 211.50
  5. Step 5: Solve for x
    x = 211.50/13.27
  6. Step 6: Final answer
    x = 15.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.