Home / 7,161.15-10,745.64-2,778.78

Finding the Fourth Proportional to 7,161.15, 10,745.64 and 2,778.78

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Solution

The fourth proportional to 7,161.15, 10,745.64 and 2,778.78 is: 4,169.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,161.15 : 10,745.64 = 2,778.78 : x
  2. Step 2: Convert to fraction form
    7,161.15/10,745.64 = 2,778.78/x
  3. Step 3: Cross multiply
    7,161.15x = 10,745.64 × 2,778.78
  4. Step 4: Simplify right side
    7,161.15x = 29,859,769.52
  5. Step 5: Solve for x
    x = 29,859,769.52/7,161.15
  6. Step 6: Final answer
    x = 4,169.69

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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.