Home / 8,879.15-13,321.40-2,639.39

Finding the Fourth Proportional to 8,879.15, 13,321.40 and 2,639.39

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Solution

The fourth proportional to 8,879.15, 13,321.40 and 2,639.39 is: 3,959.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,879.15 : 13,321.40 = 2,639.39 : x
  2. Step 2: Convert to fraction form
    8,879.15/13,321.40 = 2,639.39/x
  3. Step 3: Cross multiply
    8,879.15x = 13,321.40 × 2,639.39
  4. Step 4: Simplify right side
    8,879.15x = 35,160,290.14
  5. Step 5: Solve for x
    x = 35,160,290.14/8,879.15
  6. Step 6: Final answer
    x = 3,959.87

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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.