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Finding the Fourth Proportional to 33.21, 45.81 and 19.39

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Solution

The fourth proportional to 33.21, 45.81 and 19.39 is: 26.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    33.21 : 45.81 = 19.39 : x
  2. Step 2: Convert to fraction form
    33.21/45.81 = 19.39/x
  3. Step 3: Cross multiply
    33.21x = 45.81 × 19.39
  4. Step 4: Simplify right side
    33.21x = 888.26
  5. Step 5: Solve for x
    x = 888.26/33.21
  6. Step 6: Final answer
    x = 26.75

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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.