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Finding the Fourth Proportional to 28,768.70, 43,169.79 and 12,127.70

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Solution

The fourth proportional to 28,768.70, 43,169.79 and 12,127.70 is: 18,198.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,768.70 : 43,169.79 = 12,127.70 : x
  2. Step 2: Convert to fraction form
    28,768.70/43,169.79 = 12,127.70/x
  3. Step 3: Cross multiply
    28,768.70x = 43,169.79 × 12,127.70
  4. Step 4: Simplify right side
    28,768.70x = 523,550,262.18
  5. Step 5: Solve for x
    x = 523,550,262.18/28,768.70
  6. Step 6: Final answer
    x = 18,198.61

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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.