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Finding the Fourth Proportional to 33.55, 50.29 and 21.53

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Solution

The fourth proportional to 33.55, 50.29 and 21.53 is: 32.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    33.55 : 50.29 = 21.53 : x
  2. Step 2: Convert to fraction form
    33.55/50.29 = 21.53/x
  3. Step 3: Cross multiply
    33.55x = 50.29 × 21.53
  4. Step 4: Simplify right side
    33.55x = 1,082.82
  5. Step 5: Solve for x
    x = 1,082.82/33.55
  6. Step 6: Final answer
    x = 32.28

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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.