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Finding the Fourth Proportional to 28.18, 42.09 and 24.39

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Solution

The fourth proportional to 28.18, 42.09 and 24.39 is: 36.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28.18 : 42.09 = 24.39 : x
  2. Step 2: Convert to fraction form
    28.18/42.09 = 24.39/x
  3. Step 3: Cross multiply
    28.18x = 42.09 × 24.39
  4. Step 4: Simplify right side
    28.18x = 1,026.45
  5. Step 5: Solve for x
    x = 1,026.45/28.18
  6. Step 6: Final answer
    x = 36.42

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.