Home / 12,919.97-19,382.69-4,155.57

Finding the Fourth Proportional to 12,919.97, 19,382.69 and 4,155.57

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Solution

The fourth proportional to 12,919.97, 19,382.69 and 4,155.57 is: 6,234.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,919.97 : 19,382.69 = 4,155.57 : x
  2. Step 2: Convert to fraction form
    12,919.97/19,382.69 = 4,155.57/x
  3. Step 3: Cross multiply
    12,919.97x = 19,382.69 × 4,155.57
  4. Step 4: Simplify right side
    12,919.97x = 80,546,104.31
  5. Step 5: Solve for x
    x = 80,546,104.31/12,919.97
  6. Step 6: Final answer
    x = 6,234.24

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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.