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Finding the Fourth Proportional to 12.24, 18.36 and 5.49

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Solution

The fourth proportional to 12.24, 18.36 and 5.49 is: 8.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12.24 : 18.36 = 5.49 : x
  2. Step 2: Convert to fraction form
    12.24/18.36 = 5.49/x
  3. Step 3: Cross multiply
    12.24x = 18.36 × 5.49
  4. Step 4: Simplify right side
    12.24x = 100.80
  5. Step 5: Solve for x
    x = 100.80/12.24
  6. Step 6: Final answer
    x = 8.24

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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.