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Finding the Fourth Proportional to 33.65, 46.45 and 20.55

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Solution

The fourth proportional to 33.65, 46.45 and 20.55 is: 28.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    33.65 : 46.45 = 20.55 : x
  2. Step 2: Convert to fraction form
    33.65/46.45 = 20.55/x
  3. Step 3: Cross multiply
    33.65x = 46.45 × 20.55
  4. Step 4: Simplify right side
    33.65x = 954.36
  5. Step 5: Solve for x
    x = 954.36/33.65
  6. Step 6: Final answer
    x = 28.36

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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.