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Finding the Fourth Proportional to 28,914.93, 43,372.41 and 8,138.43

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Solution

The fourth proportional to 28,914.93, 43,372.41 and 8,138.43 is: 12,207.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,914.93 : 43,372.41 = 8,138.43 : x
  2. Step 2: Convert to fraction form
    28,914.93/43,372.41 = 8,138.43/x
  3. Step 3: Cross multiply
    28,914.93x = 43,372.41 × 8,138.43
  4. Step 4: Simplify right side
    28,914.93x = 352,983,322.72
  5. Step 5: Solve for x
    x = 352,983,322.72/28,914.93
  6. Step 6: Final answer
    x = 12,207.65

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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.