Home / 3,979.95-5,492.31-2,211.72

Finding the Fourth Proportional to 3,979.95, 5,492.31 and 2,211.72

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Solution

The fourth proportional to 3,979.95, 5,492.31 and 2,211.72 is: 3,052.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.95 : 5,492.31 = 2,211.72 : x
  2. Step 2: Convert to fraction form
    3,979.95/5,492.31 = 2,211.72/x
  3. Step 3: Cross multiply
    3,979.95x = 5,492.31 × 2,211.72
  4. Step 4: Simplify right side
    3,979.95x = 12,147,451.87
  5. Step 5: Solve for x
    x = 12,147,451.87/3,979.95
  6. Step 6: Final answer
    x = 3,052.16

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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.