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Finding the Fourth Proportional to 33,991.79, 50,930.15 and 20,816.64

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Solution

The fourth proportional to 33,991.79, 50,930.15 and 20,816.64 is: 31,189.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,991.79 : 50,930.15 = 20,816.64 : x
  2. Step 2: Convert to fraction form
    33,991.79/50,930.15 = 20,816.64/x
  3. Step 3: Cross multiply
    33,991.79x = 50,930.15 × 20,816.64
  4. Step 4: Simplify right side
    33,991.79x = 1,060,194,493.61
  5. Step 5: Solve for x
    x = 1,060,194,493.61/33,991.79
  6. Step 6: Final answer
    x = 31,189.73

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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.