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Finding the Fourth Proportional to 38.52, 53.10 and 28.13

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Solution

The fourth proportional to 38.52, 53.10 and 28.13 is: 38.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.52 : 53.10 = 28.13 : x
  2. Step 2: Convert to fraction form
    38.52/53.10 = 28.13/x
  3. Step 3: Cross multiply
    38.52x = 53.10 × 28.13
  4. Step 4: Simplify right side
    38.52x = 1,493.44
  5. Step 5: Solve for x
    x = 1,493.44/38.52
  6. Step 6: Final answer
    x = 38.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.