Home / 3,620.40-5,422.70-2,156.32

Finding the Fourth Proportional to 3,620.40, 5,422.70 and 2,156.32

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Solution

The fourth proportional to 3,620.40, 5,422.70 and 2,156.32 is: 3,229.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.40 : 5,422.70 = 2,156.32 : x
  2. Step 2: Convert to fraction form
    3,620.40/5,422.70 = 2,156.32/x
  3. Step 3: Cross multiply
    3,620.40x = 5,422.70 × 2,156.32
  4. Step 4: Simplify right side
    3,620.40x = 11,693,076.50
  5. Step 5: Solve for x
    x = 11,693,076.50/3,620.40
  6. Step 6: Final answer
    x = 3,229.78

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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.