Home / 8,142.30-12,205.11-3,209.94

Finding the Fourth Proportional to 8,142.30, 12,205.11 and 3,209.94

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Solution

The fourth proportional to 8,142.30, 12,205.11 and 3,209.94 is: 4,811.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,142.30 : 12,205.11 = 3,209.94 : x
  2. Step 2: Convert to fraction form
    8,142.30/12,205.11 = 3,209.94/x
  3. Step 3: Cross multiply
    8,142.30x = 12,205.11 × 3,209.94
  4. Step 4: Simplify right side
    8,142.30x = 39,177,670.79
  5. Step 5: Solve for x
    x = 39,177,670.79/8,142.30
  6. Step 6: Final answer
    x = 4,811.62

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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.