Home / 3,940.65-5,435.40-2,876.55

Finding the Fourth Proportional to 3,940.65, 5,435.40 and 2,876.55

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Solution

The fourth proportional to 3,940.65, 5,435.40 and 2,876.55 is: 3,967.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.65 : 5,435.40 = 2,876.55 : x
  2. Step 2: Convert to fraction form
    3,940.65/5,435.40 = 2,876.55/x
  3. Step 3: Cross multiply
    3,940.65x = 5,435.40 × 2,876.55
  4. Step 4: Simplify right side
    3,940.65x = 15,635,190.27
  5. Step 5: Solve for x
    x = 15,635,190.27/3,940.65
  6. Step 6: Final answer
    x = 3,967.67

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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.