Home / 8,426.28-12,639.87-3,231.75

Finding the Fourth Proportional to 8,426.28, 12,639.87 and 3,231.75

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Solution

The fourth proportional to 8,426.28, 12,639.87 and 3,231.75 is: 4,847.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,426.28 : 12,639.87 = 3,231.75 : x
  2. Step 2: Convert to fraction form
    8,426.28/12,639.87 = 3,231.75/x
  3. Step 3: Cross multiply
    8,426.28x = 12,639.87 × 3,231.75
  4. Step 4: Simplify right side
    8,426.28x = 40,848,899.87
  5. Step 5: Solve for x
    x = 40,848,899.87/8,426.28
  6. Step 6: Final answer
    x = 4,847.80

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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.