Home / 11,280.80-16,921.68-3,489.76

Finding the Fourth Proportional to 11,280.80, 16,921.68 and 3,489.76

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Solution

The fourth proportional to 11,280.80, 16,921.68 and 3,489.76 is: 5,234.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,280.80 : 16,921.68 = 3,489.76 : x
  2. Step 2: Convert to fraction form
    11,280.80/16,921.68 = 3,489.76/x
  3. Step 3: Cross multiply
    11,280.80x = 16,921.68 × 3,489.76
  4. Step 4: Simplify right side
    11,280.80x = 59,052,602.00
  5. Step 5: Solve for x
    x = 59,052,602.00/11,280.80
  6. Step 6: Final answer
    x = 5,234.79

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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.