Home / 13,928.87-20,879.99-5,161.43

Finding the Fourth Proportional to 13,928.87, 20,879.99 and 5,161.43

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Solution

The fourth proportional to 13,928.87, 20,879.99 and 5,161.43 is: 7,737.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,928.87 : 20,879.99 = 5,161.43 : x
  2. Step 2: Convert to fraction form
    13,928.87/20,879.99 = 5,161.43/x
  3. Step 3: Cross multiply
    13,928.87x = 20,879.99 × 5,161.43
  4. Step 4: Simplify right side
    13,928.87x = 107,770,580.98
  5. Step 5: Solve for x
    x = 107,770,580.98/13,928.87
  6. Step 6: Final answer
    x = 7,737.21

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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.