Home / 3,940.90-5,445.68-2,876.85

Finding the Fourth Proportional to 3,940.90, 5,445.68 and 2,876.85

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Solution

The fourth proportional to 3,940.90, 5,445.68 and 2,876.85 is: 3,975.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.90 : 5,445.68 = 2,876.85 : x
  2. Step 2: Convert to fraction form
    3,940.90/5,445.68 = 2,876.85/x
  3. Step 3: Cross multiply
    3,940.90x = 5,445.68 × 2,876.85
  4. Step 4: Simplify right side
    3,940.90x = 15,666,390.12
  5. Step 5: Solve for x
    x = 15,666,390.12/3,940.90
  6. Step 6: Final answer
    x = 3,975.34

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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.