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Finding the Fourth Proportional to 33.77, 46.59 and 20.81

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Solution

The fourth proportional to 33.77, 46.59 and 20.81 is: 28.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    33.77 : 46.59 = 20.81 : x
  2. Step 2: Convert to fraction form
    33.77/46.59 = 20.81/x
  3. Step 3: Cross multiply
    33.77x = 46.59 × 20.81
  4. Step 4: Simplify right side
    33.77x = 969.58
  5. Step 5: Solve for x
    x = 969.58/33.77
  6. Step 6: Final answer
    x = 28.71

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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.