Home / 13,791.30-20,680.83-3,928.34

Finding the Fourth Proportional to 13,791.30, 20,680.83 and 3,928.34

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Solution

The fourth proportional to 13,791.30, 20,680.83 and 3,928.34 is: 5,890.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,791.30 : 20,680.83 = 3,928.34 : x
  2. Step 2: Convert to fraction form
    13,791.30/20,680.83 = 3,928.34/x
  3. Step 3: Cross multiply
    13,791.30x = 20,680.83 × 3,928.34
  4. Step 4: Simplify right side
    13,791.30x = 81,241,228.32
  5. Step 5: Solve for x
    x = 81,241,228.32/13,791.30
  6. Step 6: Final answer
    x = 5,890.76

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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.