Home / 20,863.96-28,793.34-11,431.96

Finding the Fourth Proportional to 20,863.96, 28,793.34 and 11,431.96

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Solution

The fourth proportional to 20,863.96, 28,793.34 and 11,431.96 is: 15,776.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,863.96 : 28,793.34 = 11,431.96 : x
  2. Step 2: Convert to fraction form
    20,863.96/28,793.34 = 11,431.96/x
  3. Step 3: Cross multiply
    20,863.96x = 28,793.34 × 11,431.96
  4. Step 4: Simplify right side
    20,863.96x = 329,164,311.15
  5. Step 5: Solve for x
    x = 329,164,311.15/20,863.96
  6. Step 6: Final answer
    x = 15,776.69

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.