Home / 6,381.40-9,579.30-3,785.80

Finding the Fourth Proportional to 6,381.40, 9,579.30 and 3,785.80

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Solution

The fourth proportional to 6,381.40, 9,579.30 and 3,785.80 is: 5,682.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,381.40 : 9,579.30 = 3,785.80 : x
  2. Step 2: Convert to fraction form
    6,381.40/9,579.30 = 3,785.80/x
  3. Step 3: Cross multiply
    6,381.40x = 9,579.30 × 3,785.80
  4. Step 4: Simplify right side
    6,381.40x = 36,265,313.94
  5. Step 5: Solve for x
    x = 36,265,313.94/6,381.40
  6. Step 6: Final answer
    x = 5,682.97

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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.