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Finding the Fourth Proportional to 18.05, 24.72 and 17.39

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Solution

The fourth proportional to 18.05, 24.72 and 17.39 is: 23.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.05 : 24.72 = 17.39 : x
  2. Step 2: Convert to fraction form
    18.05/24.72 = 17.39/x
  3. Step 3: Cross multiply
    18.05x = 24.72 × 17.39
  4. Step 4: Simplify right side
    18.05x = 429.79
  5. Step 5: Solve for x
    x = 429.79/18.05
  6. Step 6: Final answer
    x = 23.82

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.