Home / 20,128.50-30,163.57-11,344.72

Finding the Fourth Proportional to 20,128.50, 30,163.57 and 11,344.72

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Solution

The fourth proportional to 20,128.50, 30,163.57 and 11,344.72 is: 17,000.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.50 : 30,163.57 = 11,344.72 : x
  2. Step 2: Convert to fraction form
    20,128.50/30,163.57 = 11,344.72/x
  3. Step 3: Cross multiply
    20,128.50x = 30,163.57 × 11,344.72
  4. Step 4: Simplify right side
    20,128.50x = 342,197,255.85
  5. Step 5: Solve for x
    x = 342,197,255.85/20,128.50
  6. Step 6: Final answer
    x = 17,000.63

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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.