Home / 13,745.94-20,605.09-5,431.85

Finding the Fourth Proportional to 13,745.94, 20,605.09 and 5,431.85

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Solution

The fourth proportional to 13,745.94, 20,605.09 and 5,431.85 is: 8,142.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,745.94 : 20,605.09 = 5,431.85 : x
  2. Step 2: Convert to fraction form
    13,745.94/20,605.09 = 5,431.85/x
  3. Step 3: Cross multiply
    13,745.94x = 20,605.09 × 5,431.85
  4. Step 4: Simplify right side
    13,745.94x = 111,923,758.12
  5. Step 5: Solve for x
    x = 111,923,758.12/13,745.94
  6. Step 6: Final answer
    x = 8,142.31

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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.