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Finding the Fourth Proportional to 28,940.42, 43,410.72 and 8,163.92

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Solution

The fourth proportional to 28,940.42, 43,410.72 and 8,163.92 is: 12,245.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,940.42 : 43,410.72 = 8,163.92 : x
  2. Step 2: Convert to fraction form
    28,940.42/43,410.72 = 8,163.92/x
  3. Step 3: Cross multiply
    28,940.42x = 43,410.72 × 8,163.92
  4. Step 4: Simplify right side
    28,940.42x = 354,401,645.22
  5. Step 5: Solve for x
    x = 354,401,645.22/28,940.42
  6. Step 6: Final answer
    x = 12,245.91

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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.