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Finding the Fourth Proportional to 38.25, 57.39 and 19

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Solution

The fourth proportional to 38.25, 57.39 and 19 is: 28.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.25 : 57.39 = 19 : x
  2. Step 2: Convert to fraction form
    38.25/57.39 = 19/x
  3. Step 3: Cross multiply
    38.25x = 57.39 × 19
  4. Step 4: Simplify right side
    38.25x = 1,090.41
  5. Step 5: Solve for x
    x = 1,090.41/38.25
  6. Step 6: Final answer
    x = 28.51

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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.