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Finding the Fourth Proportional to 12.11, 18.12 and 7.46

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Solution

The fourth proportional to 12.11, 18.12 and 7.46 is: 11.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12.11 : 18.12 = 7.46 : x
  2. Step 2: Convert to fraction form
    12.11/18.12 = 7.46/x
  3. Step 3: Cross multiply
    12.11x = 18.12 × 7.46
  4. Step 4: Simplify right side
    12.11x = 135.08
  5. Step 5: Solve for x
    x = 135.08/12.11
  6. Step 6: Final answer
    x = 11.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.