Home / 7,721.06-11,579.34-2,789.78

Finding the Fourth Proportional to 7,721.06, 11,579.34 and 2,789.78

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Solution

The fourth proportional to 7,721.06, 11,579.34 and 2,789.78 is: 4,183.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,721.06 : 11,579.34 = 2,789.78 : x
  2. Step 2: Convert to fraction form
    7,721.06/11,579.34 = 2,789.78/x
  3. Step 3: Cross multiply
    7,721.06x = 11,579.34 × 2,789.78
  4. Step 4: Simplify right side
    7,721.06x = 32,303,811.15
  5. Step 5: Solve for x
    x = 32,303,811.15/7,721.06
  6. Step 6: Final answer
    x = 4,183.86

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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.