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Finding the Fourth Proportional to 18.24, 25.13 and 13.62

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Solution

The fourth proportional to 18.24, 25.13 and 13.62 is: 18.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.24 : 25.13 = 13.62 : x
  2. Step 2: Convert to fraction form
    18.24/25.13 = 13.62/x
  3. Step 3: Cross multiply
    18.24x = 25.13 × 13.62
  4. Step 4: Simplify right side
    18.24x = 342.27
  5. Step 5: Solve for x
    x = 342.27/18.24
  6. Step 6: Final answer
    x = 18.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.