Home / 7,786.40-11,676.53-3,400.79

Finding the Fourth Proportional to 7,786.40, 11,676.53 and 3,400.79

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Solution

The fourth proportional to 7,786.40, 11,676.53 and 3,400.79 is: 5,099.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,786.40 : 11,676.53 = 3,400.79 : x
  2. Step 2: Convert to fraction form
    7,786.40/11,676.53 = 3,400.79/x
  3. Step 3: Cross multiply
    7,786.40x = 11,676.53 × 3,400.79
  4. Step 4: Simplify right side
    7,786.40x = 39,709,464.15
  5. Step 5: Solve for x
    x = 39,709,464.15/7,786.40
  6. Step 6: Final answer
    x = 5,099.85

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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.