Home / 8,431.22-12,639.69-3,497.78

Finding the Fourth Proportional to 8,431.22, 12,639.69 and 3,497.78

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Solution

The fourth proportional to 8,431.22, 12,639.69 and 3,497.78 is: 5,243.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,431.22 : 12,639.69 = 3,497.78 : x
  2. Step 2: Convert to fraction form
    8,431.22/12,639.69 = 3,497.78/x
  3. Step 3: Cross multiply
    8,431.22x = 12,639.69 × 3,497.78
  4. Step 4: Simplify right side
    8,431.22x = 44,210,854.89
  5. Step 5: Solve for x
    x = 44,210,854.89/8,431.22
  6. Step 6: Final answer
    x = 5,243.71

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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.