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Finding the Fourth Proportional to 36.88, 55.21 and 25.42

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Solution

The fourth proportional to 36.88, 55.21 and 25.42 is: 38.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    36.88 : 55.21 = 25.42 : x
  2. Step 2: Convert to fraction form
    36.88/55.21 = 25.42/x
  3. Step 3: Cross multiply
    36.88x = 55.21 × 25.42
  4. Step 4: Simplify right side
    36.88x = 1,403.44
  5. Step 5: Solve for x
    x = 1,403.44/36.88
  6. Step 6: Final answer
    x = 38.05

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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.