Home / 11,439.43-17,157.39-3,120.12

Finding the Fourth Proportional to 11,439.43, 17,157.39 and 3,120.12

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Solution

The fourth proportional to 11,439.43, 17,157.39 and 3,120.12 is: 4,679.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,439.43 : 17,157.39 = 3,120.12 : x
  2. Step 2: Convert to fraction form
    11,439.43/17,157.39 = 3,120.12/x
  3. Step 3: Cross multiply
    11,439.43x = 17,157.39 × 3,120.12
  4. Step 4: Simplify right side
    11,439.43x = 53,533,115.69
  5. Step 5: Solve for x
    x = 53,533,115.69/11,439.43
  6. Step 6: Final answer
    x = 4,679.70

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Half scale
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Double scale
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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.