Home / 7,719.09-11,578.60-2,788.72

Finding the Fourth Proportional to 7,719.09, 11,578.60 and 2,788.72

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Solution

The fourth proportional to 7,719.09, 11,578.60 and 2,788.72 is: 4,183.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,719.09 : 11,578.60 = 2,788.72 : x
  2. Step 2: Convert to fraction form
    7,719.09/11,578.60 = 2,788.72/x
  3. Step 3: Cross multiply
    7,719.09x = 11,578.60 × 2,788.72
  4. Step 4: Simplify right side
    7,719.09x = 32,289,473.39
  5. Step 5: Solve for x
    x = 32,289,473.39/7,719.09
  6. Step 6: Final answer
    x = 4,183.07

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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.