Home / 5,511.20-8,266.80-3,318.80

Finding the Fourth Proportional to 5,511.20, 8,266.80 and 3,318.80

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Solution

The fourth proportional to 5,511.20, 8,266.80 and 3,318.80 is: 4,978.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,511.20 : 8,266.80 = 3,318.80 : x
  2. Step 2: Convert to fraction form
    5,511.20/8,266.80 = 3,318.80/x
  3. Step 3: Cross multiply
    5,511.20x = 8,266.80 × 3,318.80
  4. Step 4: Simplify right side
    5,511.20x = 27,435,855.84
  5. Step 5: Solve for x
    x = 27,435,855.84/5,511.20
  6. Step 6: Final answer
    x = 4,978.20

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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.