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Finding the Fourth Proportional to 7,138.73, 10,707.80 and 1,944.61

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Solution

The fourth proportional to 7,138.73, 10,707.80 and 1,944.61 is: 2,916.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,138.73 : 10,707.80 = 1,944.61 : x
  2. Step 2: Convert to fraction form
    7,138.73/10,707.80 = 1,944.61/x
  3. Step 3: Cross multiply
    7,138.73x = 10,707.80 × 1,944.61
  4. Step 4: Simplify right side
    7,138.73x = 20,822,458.47
  5. Step 5: Solve for x
    x = 20,822,458.47/7,138.73
  6. Step 6: Final answer
    x = 2,916.83

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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.