Home / 8,426.87-12,640.60-3,161.34

Finding the Fourth Proportional to 8,426.87, 12,640.60 and 3,161.34

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Solution

The fourth proportional to 8,426.87, 12,640.60 and 3,161.34 is: 4,742.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,426.87 : 12,640.60 = 3,161.34 : x
  2. Step 2: Convert to fraction form
    8,426.87/12,640.60 = 3,161.34/x
  3. Step 3: Cross multiply
    8,426.87x = 12,640.60 × 3,161.34
  4. Step 4: Simplify right side
    8,426.87x = 39,961,234.40
  5. Step 5: Solve for x
    x = 39,961,234.40/8,426.87
  6. Step 6: Final answer
    x = 4,742.12

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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.