Home / 13,942.80-20,815.20-13,359.60

Finding the Fourth Proportional to 13,942.80, 20,815.20 and 13,359.60

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Solution

The fourth proportional to 13,942.80, 20,815.20 and 13,359.60 is: 19,944.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,942.80 : 20,815.20 = 13,359.60 : x
  2. Step 2: Convert to fraction form
    13,942.80/20,815.20 = 13,359.60/x
  3. Step 3: Cross multiply
    13,942.80x = 20,815.20 × 13,359.60
  4. Step 4: Simplify right side
    13,942.80x = 278,082,745.92
  5. Step 5: Solve for x
    x = 278,082,745.92/13,942.80
  6. Step 6: Final answer
    x = 19,944.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.