Home / 3,940.18-5,439.62-2,876.87

Finding the Fourth Proportional to 3,940.18, 5,439.62 and 2,876.87

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Solution

The fourth proportional to 3,940.18, 5,439.62 and 2,876.87 is: 3,971.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.18 : 5,439.62 = 2,876.87 : x
  2. Step 2: Convert to fraction form
    3,940.18/5,439.62 = 2,876.87/x
  3. Step 3: Cross multiply
    3,940.18x = 5,439.62 × 2,876.87
  4. Step 4: Simplify right side
    3,940.18x = 15,649,100.38
  5. Step 5: Solve for x
    x = 15,649,100.38/3,940.18
  6. Step 6: Final answer
    x = 3,971.67

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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.