Home / 20,464.20-28,240.31-11,511.69

Finding the Fourth Proportional to 20,464.20, 28,240.31 and 11,511.69

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Solution

The fourth proportional to 20,464.20, 28,240.31 and 11,511.69 is: 15,885.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,464.20 : 28,240.31 = 11,511.69 : x
  2. Step 2: Convert to fraction form
    20,464.20/28,240.31 = 11,511.69/x
  3. Step 3: Cross multiply
    20,464.20x = 28,240.31 × 11,511.69
  4. Step 4: Simplify right side
    20,464.20x = 325,093,694.22
  5. Step 5: Solve for x
    x = 325,093,694.22/20,464.20
  6. Step 6: Final answer
    x = 15,885.97

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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.