Home / 3,971.48-5,480.36-2,178.68

Finding the Fourth Proportional to 3,971.48, 5,480.36 and 2,178.68

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Solution

The fourth proportional to 3,971.48, 5,480.36 and 2,178.68 is: 3,006.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,971.48 : 5,480.36 = 2,178.68 : x
  2. Step 2: Convert to fraction form
    3,971.48/5,480.36 = 2,178.68/x
  3. Step 3: Cross multiply
    3,971.48x = 5,480.36 × 2,178.68
  4. Step 4: Simplify right side
    3,971.48x = 11,939,912.43
  5. Step 5: Solve for x
    x = 11,939,912.43/3,971.48
  6. Step 6: Final answer
    x = 3,006.42

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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.