Home / 4,078.80-6,121.28-2,986.00

Finding the Fourth Proportional to 4,078.80, 6,121.28 and 2,986.00

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Solution

The fourth proportional to 4,078.80, 6,121.28 and 2,986.00 is: 4,481.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,078.80 : 6,121.28 = 2,986.00 : x
  2. Step 2: Convert to fraction form
    4,078.80/6,121.28 = 2,986.00/x
  3. Step 3: Cross multiply
    4,078.80x = 6,121.28 × 2,986.00
  4. Step 4: Simplify right side
    4,078.80x = 18,278,134.24
  5. Step 5: Solve for x
    x = 18,278,134.24/4,078.80
  6. Step 6: Final answer
    x = 4,481.25

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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.