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Finding the Fourth Proportional to 33,861.78, 50,825.61 and 20,739.78

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Solution

The fourth proportional to 33,861.78, 50,825.61 and 20,739.78 is: 31,129.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,861.78 : 50,825.61 = 20,739.78 : x
  2. Step 2: Convert to fraction form
    33,861.78/50,825.61 = 20,739.78/x
  3. Step 3: Cross multiply
    33,861.78x = 50,825.61 × 20,739.78
  4. Step 4: Simplify right side
    33,861.78x = 1,054,111,969.77
  5. Step 5: Solve for x
    x = 1,054,111,969.77/33,861.78
  6. Step 6: Final answer
    x = 31,129.85

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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.