Home / 6,422.40-9,619.20-3,340.80

Finding the Fourth Proportional to 6,422.40, 9,619.20 and 3,340.80

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Solution

The fourth proportional to 6,422.40, 9,619.20 and 3,340.80 is: 5,003.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,422.40 : 9,619.20 = 3,340.80 : x
  2. Step 2: Convert to fraction form
    6,422.40/9,619.20 = 3,340.80/x
  3. Step 3: Cross multiply
    6,422.40x = 9,619.20 × 3,340.80
  4. Step 4: Simplify right side
    6,422.40x = 32,135,823.36
  5. Step 5: Solve for x
    x = 32,135,823.36/6,422.40
  6. Step 6: Final answer
    x = 5,003.71

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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.