Home / 12,105.41-18,158.13-3,785.47

Finding the Fourth Proportional to 12,105.41, 18,158.13 and 3,785.47

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Solution

The fourth proportional to 12,105.41, 18,158.13 and 3,785.47 is: 5,678.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,105.41 : 18,158.13 = 3,785.47 : x
  2. Step 2: Convert to fraction form
    12,105.41/18,158.13 = 3,785.47/x
  3. Step 3: Cross multiply
    12,105.41x = 18,158.13 × 3,785.47
  4. Step 4: Simplify right side
    12,105.41x = 68,737,056.37
  5. Step 5: Solve for x
    x = 68,737,056.37/12,105.41
  6. Step 6: Final answer
    x = 5,678.21

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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.