Home / 13,789.36-20,680.92-3,928.42

Finding the Fourth Proportional to 13,789.36, 20,680.92 and 3,928.42

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Solution

The fourth proportional to 13,789.36, 20,680.92 and 3,928.42 is: 5,891.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,789.36 : 20,680.92 = 3,928.42 : x
  2. Step 2: Convert to fraction form
    13,789.36/20,680.92 = 3,928.42/x
  3. Step 3: Cross multiply
    13,789.36x = 20,680.92 × 3,928.42
  4. Step 4: Simplify right side
    13,789.36x = 81,243,339.75
  5. Step 5: Solve for x
    x = 81,243,339.75/13,789.36
  6. Step 6: Final answer
    x = 5,891.74

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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.