Home / 6,078.20-9,111.90-5,422.10

Finding the Fourth Proportional to 6,078.20, 9,111.90 and 5,422.10

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Solution

The fourth proportional to 6,078.20, 9,111.90 and 5,422.10 is: 8,128.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,078.20 : 9,111.90 = 5,422.10 : x
  2. Step 2: Convert to fraction form
    6,078.20/9,111.90 = 5,422.10/x
  3. Step 3: Cross multiply
    6,078.20x = 9,111.90 × 5,422.10
  4. Step 4: Simplify right side
    6,078.20x = 49,405,632.99
  5. Step 5: Solve for x
    x = 49,405,632.99/6,078.20
  6. Step 6: Final answer
    x = 8,128.33

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1.5x scale

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.