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Finding the Fourth Proportional to 11.26, 15.42 and 11.12

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Solution

The fourth proportional to 11.26, 15.42 and 11.12 is: 15.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    11.26 : 15.42 = 11.12 : x
  2. Step 2: Convert to fraction form
    11.26/15.42 = 11.12/x
  3. Step 3: Cross multiply
    11.26x = 15.42 × 11.12
  4. Step 4: Simplify right side
    11.26x = 171.47
  5. Step 5: Solve for x
    x = 171.47/11.26
  6. Step 6: Final answer
    x = 15.23

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.