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Finding the Fourth Proportional to 29.76, 41.28 and 28.14

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Solution

The fourth proportional to 29.76, 41.28 and 28.14 is: 39.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.76 : 41.28 = 28.14 : x
  2. Step 2: Convert to fraction form
    29.76/41.28 = 28.14/x
  3. Step 3: Cross multiply
    29.76x = 41.28 × 28.14
  4. Step 4: Simplify right side
    29.76x = 1,161.62
  5. Step 5: Solve for x
    x = 1,161.62/29.76
  6. Step 6: Final answer
    x = 39.03

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.