Home / 20,745.43-31,118.26-5,163.05

Finding the Fourth Proportional to 20,745.43, 31,118.26 and 5,163.05

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Solution

The fourth proportional to 20,745.43, 31,118.26 and 5,163.05 is: 7,744.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,745.43 : 31,118.26 = 5,163.05 : x
  2. Step 2: Convert to fraction form
    20,745.43/31,118.26 = 5,163.05/x
  3. Step 3: Cross multiply
    20,745.43x = 31,118.26 × 5,163.05
  4. Step 4: Simplify right side
    20,745.43x = 160,665,197.18
  5. Step 5: Solve for x
    x = 160,665,197.18/20,745.43
  6. Step 6: Final answer
    x = 7,744.61

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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.