Home / 6,428.20-9,640.86-2,270.80

Finding the Fourth Proportional to 6,428.20, 9,640.86 and 2,270.80

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Solution

The fourth proportional to 6,428.20, 9,640.86 and 2,270.80 is: 3,405.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,428.20 : 9,640.86 = 2,270.80 : x
  2. Step 2: Convert to fraction form
    6,428.20/9,640.86 = 2,270.80/x
  3. Step 3: Cross multiply
    6,428.20x = 9,640.86 × 2,270.80
  4. Step 4: Simplify right side
    6,428.20x = 21,892,464.89
  5. Step 5: Solve for x
    x = 21,892,464.89/6,428.20
  6. Step 6: Final answer
    x = 3,405.69

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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.