Home / 8,428.78-12,644.66-2,880.83

Finding the Fourth Proportional to 8,428.78, 12,644.66 and 2,880.83

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Solution

The fourth proportional to 8,428.78, 12,644.66 and 2,880.83 is: 4,321.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,428.78 : 12,644.66 = 2,880.83 : x
  2. Step 2: Convert to fraction form
    8,428.78/12,644.66 = 2,880.83/x
  3. Step 3: Cross multiply
    8,428.78x = 12,644.66 × 2,880.83
  4. Step 4: Simplify right side
    8,428.78x = 36,427,115.87
  5. Step 5: Solve for x
    x = 36,427,115.87/8,428.78
  6. Step 6: Final answer
    x = 4,321.75

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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.