Home / 7,145.21-9,860.42-4,163.09

Finding the Fourth Proportional to 7,145.21, 9,860.42 and 4,163.09

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Solution

The fourth proportional to 7,145.21, 9,860.42 and 4,163.09 is: 5,745.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,145.21 : 9,860.42 = 4,163.09 : x
  2. Step 2: Convert to fraction form
    7,145.21/9,860.42 = 4,163.09/x
  3. Step 3: Cross multiply
    7,145.21x = 9,860.42 × 4,163.09
  4. Step 4: Simplify right side
    7,145.21x = 41,049,745.78
  5. Step 5: Solve for x
    x = 41,049,745.78/7,145.21
  6. Step 6: Final answer
    x = 5,745.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.