Home / 2,759.20-4,138.80-2,111.20

Finding the Fourth Proportional to 2,759.20, 4,138.80 and 2,111.20

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Solution

The fourth proportional to 2,759.20, 4,138.80 and 2,111.20 is: 3,166.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,759.20 : 4,138.80 = 2,111.20 : x
  2. Step 2: Convert to fraction form
    2,759.20/4,138.80 = 2,111.20/x
  3. Step 3: Cross multiply
    2,759.20x = 4,138.80 × 2,111.20
  4. Step 4: Simplify right side
    2,759.20x = 8,737,834.56
  5. Step 5: Solve for x
    x = 8,737,834.56/2,759.20
  6. Step 6: Final answer
    x = 3,166.80

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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.