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Finding the Fourth Proportional to 36.85, 55.17 and 31.81

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Solution

The fourth proportional to 36.85, 55.17 and 31.81 is: 47.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    36.85 : 55.17 = 31.81 : x
  2. Step 2: Convert to fraction form
    36.85/55.17 = 31.81/x
  3. Step 3: Cross multiply
    36.85x = 55.17 × 31.81
  4. Step 4: Simplify right side
    36.85x = 1,754.96
  5. Step 5: Solve for x
    x = 1,754.96/36.85
  6. Step 6: Final answer
    x = 47.62

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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.