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Finding the Fourth Proportional to 48.87, 67.44 and 28.15

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Solution

The fourth proportional to 48.87, 67.44 and 28.15 is: 38.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.87 : 67.44 = 28.15 : x
  2. Step 2: Convert to fraction form
    48.87/67.44 = 28.15/x
  3. Step 3: Cross multiply
    48.87x = 67.44 × 28.15
  4. Step 4: Simplify right side
    48.87x = 1,898.22
  5. Step 5: Solve for x
    x = 1,898.22/48.87
  6. Step 6: Final answer
    x = 38.84

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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.