Home / 4,980.31-6,872.55-2,855.73

Finding the Fourth Proportional to 4,980.31, 6,872.55 and 2,855.73

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Solution

The fourth proportional to 4,980.31, 6,872.55 and 2,855.73 is: 3,940.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,980.31 : 6,872.55 = 2,855.73 : x
  2. Step 2: Convert to fraction form
    4,980.31/6,872.55 = 2,855.73/x
  3. Step 3: Cross multiply
    4,980.31x = 6,872.55 × 2,855.73
  4. Step 4: Simplify right side
    4,980.31x = 19,626,147.21
  5. Step 5: Solve for x
    x = 19,626,147.21/4,980.31
  6. Step 6: Final answer
    x = 3,940.75

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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.