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Finding the Fourth Proportional to 28,863.72, 43,289.82 and 8,081.64

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Solution

The fourth proportional to 28,863.72, 43,289.82 and 8,081.64 is: 12,120.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,863.72 : 43,289.82 = 8,081.64 : x
  2. Step 2: Convert to fraction form
    28,863.72/43,289.82 = 8,081.64/x
  3. Step 3: Cross multiply
    28,863.72x = 43,289.82 × 8,081.64
  4. Step 4: Simplify right side
    28,863.72x = 349,852,740.90
  5. Step 5: Solve for x
    x = 349,852,740.90/28,863.72
  6. Step 6: Final answer
    x = 12,120.85

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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.