Home / 3,979.99-5,492.14-2,211.54

Finding the Fourth Proportional to 3,979.99, 5,492.14 and 2,211.54

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Solution

The fourth proportional to 3,979.99, 5,492.14 and 2,211.54 is: 3,051.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.99 : 5,492.14 = 2,211.54 : x
  2. Step 2: Convert to fraction form
    3,979.99/5,492.14 = 2,211.54/x
  3. Step 3: Cross multiply
    3,979.99x = 5,492.14 × 2,211.54
  4. Step 4: Simplify right side
    3,979.99x = 12,146,087.30
  5. Step 5: Solve for x
    x = 12,146,087.30/3,979.99
  6. Step 6: Final answer
    x = 3,051.79

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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.