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Finding the Fourth Proportional to 36.83, 50.82 and 20.45

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Solution

The fourth proportional to 36.83, 50.82 and 20.45 is: 28.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    36.83 : 50.82 = 20.45 : x
  2. Step 2: Convert to fraction form
    36.83/50.82 = 20.45/x
  3. Step 3: Cross multiply
    36.83x = 50.82 × 20.45
  4. Step 4: Simplify right side
    36.83x = 1,039.41
  5. Step 5: Solve for x
    x = 1,039.41/36.83
  6. Step 6: Final answer
    x = 28.22

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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.