Home / 13,739.20-20,609.96-4,380.55

Finding the Fourth Proportional to 13,739.20, 20,609.96 and 4,380.55

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Solution

The fourth proportional to 13,739.20, 20,609.96 and 4,380.55 is: 6,571.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,739.20 : 20,609.96 = 4,380.55 : x
  2. Step 2: Convert to fraction form
    13,739.20/20,609.96 = 4,380.55/x
  3. Step 3: Cross multiply
    13,739.20x = 20,609.96 × 4,380.55
  4. Step 4: Simplify right side
    13,739.20x = 90,282,960.28
  5. Step 5: Solve for x
    x = 90,282,960.28/13,739.20
  6. Step 6: Final answer
    x = 6,571.19

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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.