Home / 20,961.24-31,404.84-11,078.64

Finding the Fourth Proportional to 20,961.24, 31,404.84 and 11,078.64

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Solution

The fourth proportional to 20,961.24, 31,404.84 and 11,078.64 is: 16,598.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,961.24 : 31,404.84 = 11,078.64 : x
  2. Step 2: Convert to fraction form
    20,961.24/31,404.84 = 11,078.64/x
  3. Step 3: Cross multiply
    20,961.24x = 31,404.84 × 11,078.64
  4. Step 4: Simplify right side
    20,961.24x = 347,922,916.62
  5. Step 5: Solve for x
    x = 347,922,916.62/20,961.24
  6. Step 6: Final answer
    x = 16,598.39

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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.