Home / 8,379.12-12,568.34-2,139.29

Finding the Fourth Proportional to 8,379.12, 12,568.34 and 2,139.29

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Solution

The fourth proportional to 8,379.12, 12,568.34 and 2,139.29 is: 3,208.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,379.12 : 12,568.34 = 2,139.29 : x
  2. Step 2: Convert to fraction form
    8,379.12/12,568.34 = 2,139.29/x
  3. Step 3: Cross multiply
    8,379.12x = 12,568.34 × 2,139.29
  4. Step 4: Simplify right side
    8,379.12x = 26,887,324.08
  5. Step 5: Solve for x
    x = 26,887,324.08/8,379.12
  6. Step 6: Final answer
    x = 3,208.85

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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.