Home / 20,863.12-28,791.14-11,431.64

Finding the Fourth Proportional to 20,863.12, 28,791.14 and 11,431.64

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Solution

The fourth proportional to 20,863.12, 28,791.14 and 11,431.64 is: 15,775.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,863.12 : 28,791.14 = 11,431.64 : x
  2. Step 2: Convert to fraction form
    20,863.12/28,791.14 = 11,431.64/x
  3. Step 3: Cross multiply
    20,863.12x = 28,791.14 × 11,431.64
  4. Step 4: Simplify right side
    20,863.12x = 329,129,947.67
  5. Step 5: Solve for x
    x = 329,129,947.67/20,863.12
  6. Step 6: Final answer
    x = 15,775.68

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Half scale
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Double scale
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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.