Home / 3,979.88-5,492.10-2,211.38

Finding the Fourth Proportional to 3,979.88, 5,492.10 and 2,211.38

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Solution

The fourth proportional to 3,979.88, 5,492.10 and 2,211.38 is: 3,051.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.88 : 5,492.10 = 2,211.38 : x
  2. Step 2: Convert to fraction form
    3,979.88/5,492.10 = 2,211.38/x
  3. Step 3: Cross multiply
    3,979.88x = 5,492.10 × 2,211.38
  4. Step 4: Simplify right side
    3,979.88x = 12,145,106.08
  5. Step 5: Solve for x
    x = 12,145,106.08/3,979.88
  6. Step 6: Final answer
    x = 3,051.62

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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.