Home / 2,620.35-3,930.93-2,136.78

Finding the Fourth Proportional to 2,620.35, 3,930.93 and 2,136.78

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Solution

The fourth proportional to 2,620.35, 3,930.93 and 2,136.78 is: 3,205.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,620.35 : 3,930.93 = 2,136.78 : x
  2. Step 2: Convert to fraction form
    2,620.35/3,930.93 = 2,136.78/x
  3. Step 3: Cross multiply
    2,620.35x = 3,930.93 × 2,136.78
  4. Step 4: Simplify right side
    2,620.35x = 8,399,532.61
  5. Step 5: Solve for x
    x = 8,399,532.61/2,620.35
  6. Step 6: Final answer
    x = 3,205.50

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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.