Home / 3,618.72-4,993.20-2,221.92

Finding the Fourth Proportional to 3,618.72, 4,993.20 and 2,221.92

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Solution

The fourth proportional to 3,618.72, 4,993.20 and 2,221.92 is: 3,065.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,618.72 : 4,993.20 = 2,221.92 : x
  2. Step 2: Convert to fraction form
    3,618.72/4,993.20 = 2,221.92/x
  3. Step 3: Cross multiply
    3,618.72x = 4,993.20 × 2,221.92
  4. Step 4: Simplify right side
    3,618.72x = 11,094,490.94
  5. Step 5: Solve for x
    x = 11,094,490.94/3,618.72
  6. Step 6: Final answer
    x = 3,065.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.