Home / 4,719.20-7,078.84-2,121.52

Finding the Fourth Proportional to 4,719.20, 7,078.84 and 2,121.52

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Solution

The fourth proportional to 4,719.20, 7,078.84 and 2,121.52 is: 3,182.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,719.20 : 7,078.84 = 2,121.52 : x
  2. Step 2: Convert to fraction form
    4,719.20/7,078.84 = 2,121.52/x
  3. Step 3: Cross multiply
    4,719.20x = 7,078.84 × 2,121.52
  4. Step 4: Simplify right side
    4,719.20x = 15,017,900.64
  5. Step 5: Solve for x
    x = 15,017,900.64/4,719.20
  6. Step 6: Final answer
    x = 3,182.30

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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.