Home / 12,105.72-18,158.58-5,531.76

Finding the Fourth Proportional to 12,105.72, 18,158.58 and 5,531.76

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Solution

The fourth proportional to 12,105.72, 18,158.58 and 5,531.76 is: 8,297.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,105.72 : 18,158.58 = 5,531.76 : x
  2. Step 2: Convert to fraction form
    12,105.72/18,158.58 = 5,531.76/x
  3. Step 3: Cross multiply
    12,105.72x = 18,158.58 × 5,531.76
  4. Step 4: Simplify right side
    12,105.72x = 100,448,906.50
  5. Step 5: Solve for x
    x = 100,448,906.50/12,105.72
  6. Step 6: Final answer
    x = 8,297.64

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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.