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Finding the Fourth Proportional to 28.23, 42.35 and 8.96

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Solution

The fourth proportional to 28.23, 42.35 and 8.96 is: 13.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28.23 : 42.35 = 8.96 : x
  2. Step 2: Convert to fraction form
    28.23/42.35 = 8.96/x
  3. Step 3: Cross multiply
    28.23x = 42.35 × 8.96
  4. Step 4: Simplify right side
    28.23x = 379.52
  5. Step 5: Solve for x
    x = 379.52/28.23
  6. Step 6: Final answer
    x = 13.44

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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.