Home / 8,128.20-12,192.30-2,861.97

Finding the Fourth Proportional to 8,128.20, 12,192.30 and 2,861.97

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Solution

The fourth proportional to 8,128.20, 12,192.30 and 2,861.97 is: 4,292.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128.20 : 12,192.30 = 2,861.97 : x
  2. Step 2: Convert to fraction form
    8,128.20/12,192.30 = 2,861.97/x
  3. Step 3: Cross multiply
    8,128.20x = 12,192.30 × 2,861.97
  4. Step 4: Simplify right side
    8,128.20x = 34,893,996.83
  5. Step 5: Solve for x
    x = 34,893,996.83/8,128.20
  6. Step 6: Final answer
    x = 4,292.96

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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.