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Finding the Fourth Proportional to 28,891.62, 43,339.05 and 8,113.50

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Solution

The fourth proportional to 28,891.62, 43,339.05 and 8,113.50 is: 12,170.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,891.62 : 43,339.05 = 8,113.50 : x
  2. Step 2: Convert to fraction form
    28,891.62/43,339.05 = 8,113.50/x
  3. Step 3: Cross multiply
    28,891.62x = 43,339.05 × 8,113.50
  4. Step 4: Simplify right side
    28,891.62x = 351,631,382.18
  5. Step 5: Solve for x
    x = 351,631,382.18/28,891.62
  6. Step 6: Final answer
    x = 12,170.70

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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.