Home / 13,190.80-19,789.20-3,956.56

Finding the Fourth Proportional to 13,190.80, 19,789.20 and 3,956.56

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Solution

The fourth proportional to 13,190.80, 19,789.20 and 3,956.56 is: 5,935.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,190.80 : 19,789.20 = 3,956.56 : x
  2. Step 2: Convert to fraction form
    13,190.80/19,789.20 = 3,956.56/x
  3. Step 3: Cross multiply
    13,190.80x = 19,789.20 × 3,956.56
  4. Step 4: Simplify right side
    13,190.80x = 78,297,157.15
  5. Step 5: Solve for x
    x = 78,297,157.15/13,190.80
  6. Step 6: Final answer
    x = 5,935.74

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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.