Home / 8,128.60-12,192.89-2,285.21

Finding the Fourth Proportional to 8,128.60, 12,192.89 and 2,285.21

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Solution

The fourth proportional to 8,128.60, 12,192.89 and 2,285.21 is: 3,427.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128.60 : 12,192.89 = 2,285.21 : x
  2. Step 2: Convert to fraction form
    8,128.60/12,192.89 = 2,285.21/x
  3. Step 3: Cross multiply
    8,128.60x = 12,192.89 × 2,285.21
  4. Step 4: Simplify right side
    8,128.60x = 27,863,258.91
  5. Step 5: Solve for x
    x = 27,863,258.91/8,128.60
  6. Step 6: Final answer
    x = 3,427.81

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Similar ratio
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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.