Home / 7,719.20-11,571.76-2,787.72

Finding the Fourth Proportional to 7,719.20, 11,571.76 and 2,787.72

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Solution

The fourth proportional to 7,719.20, 11,571.76 and 2,787.72 is: 4,179.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,719.20 : 11,571.76 = 2,787.72 : x
  2. Step 2: Convert to fraction form
    7,719.20/11,571.76 = 2,787.72/x
  3. Step 3: Cross multiply
    7,719.20x = 11,571.76 × 2,787.72
  4. Step 4: Simplify right side
    7,719.20x = 32,258,826.79
  5. Step 5: Solve for x
    x = 32,258,826.79/7,719.20
  6. Step 6: Final answer
    x = 4,179.04

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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.