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Finding the Fourth Proportional to 33.81, 50.70 and 18.57

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Solution

The fourth proportional to 33.81, 50.70 and 18.57 is: 27.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    33.81 : 50.70 = 18.57 : x
  2. Step 2: Convert to fraction form
    33.81/50.70 = 18.57/x
  3. Step 3: Cross multiply
    33.81x = 50.70 × 18.57
  4. Step 4: Simplify right side
    33.81x = 941.50
  5. Step 5: Solve for x
    x = 941.50/33.81
  6. Step 6: Final answer
    x = 27.85

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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.