Home / 8,379.25-12,568.68-2,139.12

Finding the Fourth Proportional to 8,379.25, 12,568.68 and 2,139.12

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Solution

The fourth proportional to 8,379.25, 12,568.68 and 2,139.12 is: 3,208.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,379.25 : 12,568.68 = 2,139.12 : x
  2. Step 2: Convert to fraction form
    8,379.25/12,568.68 = 2,139.12/x
  3. Step 3: Cross multiply
    8,379.25x = 12,568.68 × 2,139.12
  4. Step 4: Simplify right side
    8,379.25x = 26,885,914.76
  5. Step 5: Solve for x
    x = 26,885,914.76/8,379.25
  6. Step 6: Final answer
    x = 3,208.63

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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.