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Finding the Fourth Proportional to 28,679.70, 43,027.74 and 8,958.54

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Solution

The fourth proportional to 28,679.70, 43,027.74 and 8,958.54 is: 13,440.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,679.70 : 43,027.74 = 8,958.54 : x
  2. Step 2: Convert to fraction form
    28,679.70/43,027.74 = 8,958.54/x
  3. Step 3: Cross multiply
    28,679.70x = 43,027.74 × 8,958.54
  4. Step 4: Simplify right side
    28,679.70x = 385,465,729.90
  5. Step 5: Solve for x
    x = 385,465,729.90/28,679.70
  6. Step 6: Final answer
    x = 13,440.37

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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.