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Finding the Fourth Proportional to 33.81, 46.66 and 20

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Solution

The fourth proportional to 33.81, 46.66 and 20 is: 27.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    33.81 : 46.66 = 20 : x
  2. Step 2: Convert to fraction form
    33.81/46.66 = 20/x
  3. Step 3: Cross multiply
    33.81x = 46.66 × 20
  4. Step 4: Simplify right side
    33.81x = 933.20
  5. Step 5: Solve for x
    x = 933.20/33.81
  6. Step 6: Final answer
    x = 27.60

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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.