Home / 7,812.76-11,719.68-2,618.60

Finding the Fourth Proportional to 7,812.76, 11,719.68 and 2,618.60

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Solution

The fourth proportional to 7,812.76, 11,719.68 and 2,618.60 is: 3,928.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,812.76 : 11,719.68 = 2,618.60 : x
  2. Step 2: Convert to fraction form
    7,812.76/11,719.68 = 2,618.60/x
  3. Step 3: Cross multiply
    7,812.76x = 11,719.68 × 2,618.60
  4. Step 4: Simplify right side
    7,812.76x = 30,689,154.05
  5. Step 5: Solve for x
    x = 30,689,154.05/7,812.76
  6. Step 6: Final answer
    x = 3,928.08

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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.