Home / 20,919.82-28,864.24-11,845.39

Finding the Fourth Proportional to 20,919.82, 28,864.24 and 11,845.39

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Solution

The fourth proportional to 20,919.82, 28,864.24 and 11,845.39 is: 16,343.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,919.82 : 28,864.24 = 11,845.39 : x
  2. Step 2: Convert to fraction form
    20,919.82/28,864.24 = 11,845.39/x
  3. Step 3: Cross multiply
    20,919.82x = 28,864.24 × 11,845.39
  4. Step 4: Simplify right side
    20,919.82x = 341,908,179.85
  5. Step 5: Solve for x
    x = 341,908,179.85/20,919.82
  6. Step 6: Final answer
    x = 16,343.74

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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.