Home / 20,129.05-27,773.94-12,171.70

Finding the Fourth Proportional to 20,129.05, 27,773.94 and 12,171.70

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Solution

The fourth proportional to 20,129.05, 27,773.94 and 12,171.70 is: 16,794.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,129.05 : 27,773.94 = 12,171.70 : x
  2. Step 2: Convert to fraction form
    20,129.05/27,773.94 = 12,171.70/x
  3. Step 3: Cross multiply
    20,129.05x = 27,773.94 × 12,171.70
  4. Step 4: Simplify right side
    20,129.05x = 338,056,065.50
  5. Step 5: Solve for x
    x = 338,056,065.50/20,129.05
  6. Step 6: Final answer
    x = 16,794.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.