Home / 3,971.99-5,481.34-2,179.49

Finding the Fourth Proportional to 3,971.99, 5,481.34 and 2,179.49

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Solution

The fourth proportional to 3,971.99, 5,481.34 and 2,179.49 is: 3,007.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,971.99 : 5,481.34 = 2,179.49 : x
  2. Step 2: Convert to fraction form
    3,971.99/5,481.34 = 2,179.49/x
  3. Step 3: Cross multiply
    3,971.99x = 5,481.34 × 2,179.49
  4. Step 4: Simplify right side
    3,971.99x = 11,946,492.86
  5. Step 5: Solve for x
    x = 11,946,492.86/3,971.99
  6. Step 6: Final answer
    x = 3,007.68

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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.