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Finding the Fourth Proportional to 23.88, 35.81 and 7.85

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Solution

The fourth proportional to 23.88, 35.81 and 7.85 is: 11.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    23.88 : 35.81 = 7.85 : x
  2. Step 2: Convert to fraction form
    23.88/35.81 = 7.85/x
  3. Step 3: Cross multiply
    23.88x = 35.81 × 7.85
  4. Step 4: Simplify right side
    23.88x = 281.11
  5. Step 5: Solve for x
    x = 281.11/23.88
  6. Step 6: Final answer
    x = 11.77

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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.