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Finding the Fourth Proportional to 11.22, 15.39 and 11.13

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Solution

The fourth proportional to 11.22, 15.39 and 11.13 is: 15.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    11.22 : 15.39 = 11.13 : x
  2. Step 2: Convert to fraction form
    11.22/15.39 = 11.13/x
  3. Step 3: Cross multiply
    11.22x = 15.39 × 11.13
  4. Step 4: Simplify right side
    11.22x = 171.29
  5. Step 5: Solve for x
    x = 171.29/11.22
  6. Step 6: Final answer
    x = 15.27

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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.