Home / 3,979.99-5,492.49-2,211.76

Finding the Fourth Proportional to 3,979.99, 5,492.49 and 2,211.76

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Solution

The fourth proportional to 3,979.99, 5,492.49 and 2,211.76 is: 3,052.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.99 : 5,492.49 = 2,211.76 : x
  2. Step 2: Convert to fraction form
    3,979.99/5,492.49 = 2,211.76/x
  3. Step 3: Cross multiply
    3,979.99x = 5,492.49 × 2,211.76
  4. Step 4: Simplify right side
    3,979.99x = 12,148,069.68
  5. Step 5: Solve for x
    x = 12,148,069.68/3,979.99
  6. Step 6: Final answer
    x = 3,052.29

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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.