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Finding the Fourth Proportional to 38.40, 57.52 and 18.05

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Solution

The fourth proportional to 38.40, 57.52 and 18.05 is: 27.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.40 : 57.52 = 18.05 : x
  2. Step 2: Convert to fraction form
    38.40/57.52 = 18.05/x
  3. Step 3: Cross multiply
    38.40x = 57.52 × 18.05
  4. Step 4: Simplify right side
    38.40x = 1,038.24
  5. Step 5: Solve for x
    x = 1,038.24/38.40
  6. Step 6: Final answer
    x = 27.04

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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.