Home / 20,947.09-28,906.24-11,515.59

Finding the Fourth Proportional to 20,947.09, 28,906.24 and 11,515.59

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Solution

The fourth proportional to 20,947.09, 28,906.24 and 11,515.59 is: 15,891.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,947.09 : 28,906.24 = 11,515.59 : x
  2. Step 2: Convert to fraction form
    20,947.09/28,906.24 = 11,515.59/x
  3. Step 3: Cross multiply
    20,947.09x = 28,906.24 × 11,515.59
  4. Step 4: Simplify right side
    20,947.09x = 332,872,408.28
  5. Step 5: Solve for x
    x = 332,872,408.28/20,947.09
  6. Step 6: Final answer
    x = 15,891.11

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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.