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Finding the Fourth Proportional to 24.27, 36.40 and 12.85

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Solution

The fourth proportional to 24.27, 36.40 and 12.85 is: 19.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    24.27 : 36.40 = 12.85 : x
  2. Step 2: Convert to fraction form
    24.27/36.40 = 12.85/x
  3. Step 3: Cross multiply
    24.27x = 36.40 × 12.85
  4. Step 4: Simplify right side
    24.27x = 467.74
  5. Step 5: Solve for x
    x = 467.74/24.27
  6. Step 6: Final answer
    x = 19.27

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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.