Home / 13,380.75-20,069.60-3,520.79

Finding the Fourth Proportional to 13,380.75, 20,069.60 and 3,520.79

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Solution

The fourth proportional to 13,380.75, 20,069.60 and 3,520.79 is: 5,280.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,380.75 : 20,069.60 = 3,520.79 : x
  2. Step 2: Convert to fraction form
    13,380.75/20,069.60 = 3,520.79/x
  3. Step 3: Cross multiply
    13,380.75x = 20,069.60 × 3,520.79
  4. Step 4: Simplify right side
    13,380.75x = 70,660,729.03
  5. Step 5: Solve for x
    x = 70,660,729.03/13,380.75
  6. Step 6: Final answer
    x = 5,280.77

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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.