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Finding the Fourth Proportional to 38, 57.04 and 19

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Solution

The fourth proportional to 38, 57.04 and 19 is: 28.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    38 : 57.04 = 19 : x
  2. Step 2: Convert to fraction form
    38/57.04 = 19/x
  3. Step 3: Cross multiply
    38x = 57.04 × 19
  4. Step 4: Simplify right side
    38x = 1,083.76
  5. Step 5: Solve for x
    x = 1,083.76/38
  6. Step 6: Final answer
    x = 28.52

Related Problems

Find fourth proportional to 19, 28.52 and 9.50
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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.