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Finding the Fourth Proportional to 28,906.56, 43,358.84 and 12,255.87

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Solution

The fourth proportional to 28,906.56, 43,358.84 and 12,255.87 is: 18,383.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,906.56 : 43,358.84 = 12,255.87 : x
  2. Step 2: Convert to fraction form
    28,906.56/43,358.84 = 12,255.87/x
  3. Step 3: Cross multiply
    28,906.56x = 43,358.84 × 12,255.87
  4. Step 4: Simplify right side
    28,906.56x = 531,400,120.24
  5. Step 5: Solve for x
    x = 531,400,120.24/28,906.56
  6. Step 6: Final answer
    x = 18,383.38

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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.