Home / 3,786.40-5,679.60-3,575.20

Finding the Fourth Proportional to 3,786.40, 5,679.60 and 3,575.20

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Solution

The fourth proportional to 3,786.40, 5,679.60 and 3,575.20 is: 5,362.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,786.40 : 5,679.60 = 3,575.20 : x
  2. Step 2: Convert to fraction form
    3,786.40/5,679.60 = 3,575.20/x
  3. Step 3: Cross multiply
    3,786.40x = 5,679.60 × 3,575.20
  4. Step 4: Simplify right side
    3,786.40x = 20,305,705.92
  5. Step 5: Solve for x
    x = 20,305,705.92/3,786.40
  6. Step 6: Final answer
    x = 5,362.80

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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.