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Finding the Fourth Proportional to 28,906.34, 43,361.39 and 8,913.38

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Solution

The fourth proportional to 28,906.34, 43,361.39 and 8,913.38 is: 13,370.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,906.34 : 43,361.39 = 8,913.38 : x
  2. Step 2: Convert to fraction form
    28,906.34/43,361.39 = 8,913.38/x
  3. Step 3: Cross multiply
    28,906.34x = 43,361.39 × 8,913.38
  4. Step 4: Simplify right side
    28,906.34x = 386,496,351.87
  5. Step 5: Solve for x
    x = 386,496,351.87/28,906.34
  6. Step 6: Final answer
    x = 13,370.65

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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.