Home / 20,947.68-28,910.08-11,998.12

Finding the Fourth Proportional to 20,947.68, 28,910.08 and 11,998.12

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Solution

The fourth proportional to 20,947.68, 28,910.08 and 11,998.12 is: 16,558.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,947.68 : 28,910.08 = 11,998.12 : x
  2. Step 2: Convert to fraction form
    20,947.68/28,910.08 = 11,998.12/x
  3. Step 3: Cross multiply
    20,947.68x = 28,910.08 × 11,998.12
  4. Step 4: Simplify right side
    20,947.68x = 346,866,609.05
  5. Step 5: Solve for x
    x = 346,866,609.05/20,947.68
  6. Step 6: Final answer
    x = 16,558.71

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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.