Home / 5,471.08-8,206.79-2,139.20

Finding the Fourth Proportional to 5,471.08, 8,206.79 and 2,139.20

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Solution

The fourth proportional to 5,471.08, 8,206.79 and 2,139.20 is: 3,208.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,471.08 : 8,206.79 = 2,139.20 : x
  2. Step 2: Convert to fraction form
    5,471.08/8,206.79 = 2,139.20/x
  3. Step 3: Cross multiply
    5,471.08x = 8,206.79 × 2,139.20
  4. Step 4: Simplify right side
    5,471.08x = 17,555,960.26
  5. Step 5: Solve for x
    x = 17,555,960.26/5,471.08
  6. Step 6: Final answer
    x = 3,208.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.