Home / 20,352.91-28,086.19-11,855.29

Finding the Fourth Proportional to 20,352.91, 28,086.19 and 11,855.29

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Solution

The fourth proportional to 20,352.91, 28,086.19 and 11,855.29 is: 16,359.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,352.91 : 28,086.19 = 11,855.29 : x
  2. Step 2: Convert to fraction form
    20,352.91/28,086.19 = 11,855.29/x
  3. Step 3: Cross multiply
    20,352.91x = 28,086.19 × 11,855.29
  4. Step 4: Simplify right side
    20,352.91x = 332,969,927.45
  5. Step 5: Solve for x
    x = 332,969,927.45/20,352.91
  6. Step 6: Final answer
    x = 16,359.82

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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.