Home / 7,861.70-11,789.84-3,180.54

Finding the Fourth Proportional to 7,861.70, 11,789.84 and 3,180.54

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Solution

The fourth proportional to 7,861.70, 11,789.84 and 3,180.54 is: 4,769.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,861.70 : 11,789.84 = 3,180.54 : x
  2. Step 2: Convert to fraction form
    7,861.70/11,789.84 = 3,180.54/x
  3. Step 3: Cross multiply
    7,861.70x = 11,789.84 × 3,180.54
  4. Step 4: Simplify right side
    7,861.70x = 37,498,057.71
  5. Step 5: Solve for x
    x = 37,498,057.71/7,861.70
  6. Step 6: Final answer
    x = 4,769.71

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1.5x scale

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.