Home / 5,490.40-8,221.20-4,021.60

Finding the Fourth Proportional to 5,490.40, 8,221.20 and 4,021.60

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Solution

The fourth proportional to 5,490.40, 8,221.20 and 4,021.60 is: 6,021.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,490.40 : 8,221.20 = 4,021.60 : x
  2. Step 2: Convert to fraction form
    5,490.40/8,221.20 = 4,021.60/x
  3. Step 3: Cross multiply
    5,490.40x = 8,221.20 × 4,021.60
  4. Step 4: Simplify right side
    5,490.40x = 33,062,377.92
  5. Step 5: Solve for x
    x = 33,062,377.92/5,490.40
  6. Step 6: Final answer
    x = 6,021.85

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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.