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Finding the Fourth Proportional to 28,906.71, 43,361.96 and 8,913.75

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Solution

The fourth proportional to 28,906.71, 43,361.96 and 8,913.75 is: 13,371.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,906.71 : 43,361.96 = 8,913.75 : x
  2. Step 2: Convert to fraction form
    28,906.71/43,361.96 = 8,913.75/x
  3. Step 3: Cross multiply
    28,906.71x = 43,361.96 × 8,913.75
  4. Step 4: Simplify right side
    28,906.71x = 386,517,626.38
  5. Step 5: Solve for x
    x = 386,517,626.38/28,906.71
  6. Step 6: Final answer
    x = 13,371.21

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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.