Home / 3,971.05-5,480.04-2,178.54

Finding the Fourth Proportional to 3,971.05, 5,480.04 and 2,178.54

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Solution

The fourth proportional to 3,971.05, 5,480.04 and 2,178.54 is: 3,006.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,971.05 : 5,480.04 = 2,178.54 : x
  2. Step 2: Convert to fraction form
    3,971.05/5,480.04 = 2,178.54/x
  3. Step 3: Cross multiply
    3,971.05x = 5,480.04 × 2,178.54
  4. Step 4: Simplify right side
    3,971.05x = 11,938,491.79
  5. Step 5: Solve for x
    x = 11,938,491.79/3,971.05
  6. Step 6: Final answer
    x = 3,006.38

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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.