Home / 8,128.24-12,192.42-2,581.60

Finding the Fourth Proportional to 8,128.24, 12,192.42 and 2,581.60

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Solution

The fourth proportional to 8,128.24, 12,192.42 and 2,581.60 is: 3,872.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128.24 : 12,192.42 = 2,581.60 : x
  2. Step 2: Convert to fraction form
    8,128.24/12,192.42 = 2,581.60/x
  3. Step 3: Cross multiply
    8,128.24x = 12,192.42 × 2,581.60
  4. Step 4: Simplify right side
    8,128.24x = 31,475,951.47
  5. Step 5: Solve for x
    x = 31,475,951.47/8,128.24
  6. Step 6: Final answer
    x = 3,872.42

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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.