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Finding the Fourth Proportional to 12, 18.01 and 7.48

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Solution

The fourth proportional to 12, 18.01 and 7.48 is: 11.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12 : 18.01 = 7.48 : x
  2. Step 2: Convert to fraction form
    12/18.01 = 7.48/x
  3. Step 3: Cross multiply
    12x = 18.01 × 7.48
  4. Step 4: Simplify right side
    12x = 134.59
  5. Step 5: Solve for x
    x = 134.59/12
  6. Step 6: Final answer
    x = 11.22

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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.