Home / 3,979.81-5,492.20-2,211.58

Finding the Fourth Proportional to 3,979.81, 5,492.20 and 2,211.58

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Solution

The fourth proportional to 3,979.81, 5,492.20 and 2,211.58 is: 3,052.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.81 : 5,492.20 = 2,211.58 : x
  2. Step 2: Convert to fraction form
    3,979.81/5,492.20 = 2,211.58/x
  3. Step 3: Cross multiply
    3,979.81x = 5,492.20 × 2,211.58
  4. Step 4: Simplify right side
    3,979.81x = 12,146,439.68
  5. Step 5: Solve for x
    x = 12,146,439.68/3,979.81
  6. Step 6: Final answer
    x = 3,052.01

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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.