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Finding the Fourth Proportional to 18.05, 25.04 and 16.43

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Solution

The fourth proportional to 18.05, 25.04 and 16.43 is: 22.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.05 : 25.04 = 16.43 : x
  2. Step 2: Convert to fraction form
    18.05/25.04 = 16.43/x
  3. Step 3: Cross multiply
    18.05x = 25.04 × 16.43
  4. Step 4: Simplify right side
    18.05x = 411.41
  5. Step 5: Solve for x
    x = 411.41/18.05
  6. Step 6: Final answer
    x = 22.79

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.