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Finding the Fourth Proportional to 33,791.20, 50,728.40 and 21,311.20

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Solution

The fourth proportional to 33,791.20, 50,728.40 and 21,311.20 is: 31,993.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,791.20 : 50,728.40 = 21,311.20 : x
  2. Step 2: Convert to fraction form
    33,791.20/50,728.40 = 21,311.20/x
  3. Step 3: Cross multiply
    33,791.20x = 50,728.40 × 21,311.20
  4. Step 4: Simplify right side
    33,791.20x = 1,081,083,078.08
  5. Step 5: Solve for x
    x = 1,081,083,078.08/33,791.20
  6. Step 6: Final answer
    x = 31,993.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.