Home / 3,120.10-4,311.86-2,787.93

Finding the Fourth Proportional to 3,120.10, 4,311.86 and 2,787.93

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Solution

The fourth proportional to 3,120.10, 4,311.86 and 2,787.93 is: 3,852.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.10 : 4,311.86 = 2,787.93 : x
  2. Step 2: Convert to fraction form
    3,120.10/4,311.86 = 2,787.93/x
  3. Step 3: Cross multiply
    3,120.10x = 4,311.86 × 2,787.93
  4. Step 4: Simplify right side
    3,120.10x = 12,021,163.85
  5. Step 5: Solve for x
    x = 12,021,163.85/3,120.10
  6. Step 6: Final answer
    x = 3,852.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.