Home / 8,379.24-12,568.78-2,139.17

Finding the Fourth Proportional to 8,379.24, 12,568.78 and 2,139.17

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Solution

The fourth proportional to 8,379.24, 12,568.78 and 2,139.17 is: 3,208.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,379.24 : 12,568.78 = 2,139.17 : x
  2. Step 2: Convert to fraction form
    8,379.24/12,568.78 = 2,139.17/x
  3. Step 3: Cross multiply
    8,379.24x = 12,568.78 × 2,139.17
  4. Step 4: Simplify right side
    8,379.24x = 26,886,688.92
  5. Step 5: Solve for x
    x = 26,886,688.92/8,379.24
  6. Step 6: Final answer
    x = 3,208.73

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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.