Home / 20,889.18-28,826.55-11,936.12

Finding the Fourth Proportional to 20,889.18, 28,826.55 and 11,936.12

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Solution

The fourth proportional to 20,889.18, 28,826.55 and 11,936.12 is: 16,471.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,889.18 : 28,826.55 = 11,936.12 : x
  2. Step 2: Convert to fraction form
    20,889.18/28,826.55 = 11,936.12/x
  3. Step 3: Cross multiply
    20,889.18x = 28,826.55 × 11,936.12
  4. Step 4: Simplify right side
    20,889.18x = 344,077,015.85
  5. Step 5: Solve for x
    x = 344,077,015.85/20,889.18
  6. Step 6: Final answer
    x = 16,471.54

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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.