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Finding the Fourth Proportional to 28,906.94, 43,367.87 and 8,915.98

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Solution

The fourth proportional to 28,906.94, 43,367.87 and 8,915.98 is: 13,376.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,906.94 : 43,367.87 = 8,915.98 : x
  2. Step 2: Convert to fraction form
    28,906.94/43,367.87 = 8,915.98/x
  3. Step 3: Cross multiply
    28,906.94x = 43,367.87 × 8,915.98
  4. Step 4: Simplify right side
    28,906.94x = 386,667,117.73
  5. Step 5: Solve for x
    x = 386,667,117.73/28,906.94
  6. Step 6: Final answer
    x = 13,376.27

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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.