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Finding the Fourth Proportional to 11.18, 16.91 and 11.13

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Solution

The fourth proportional to 11.18, 16.91 and 11.13 is: 16.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    11.18 : 16.91 = 11.13 : x
  2. Step 2: Convert to fraction form
    11.18/16.91 = 11.13/x
  3. Step 3: Cross multiply
    11.18x = 16.91 × 11.13
  4. Step 4: Simplify right side
    11.18x = 188.13
  5. Step 5: Solve for x
    x = 188.13/11.18
  6. Step 6: Final answer
    x = 16.82

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.