Home / 20,947.47-28,906.77-11,515.96

Finding the Fourth Proportional to 20,947.47, 28,906.77 and 11,515.96

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Solution

The fourth proportional to 20,947.47, 28,906.77 and 11,515.96 is: 15,891.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,947.47 : 28,906.77 = 11,515.96 : x
  2. Step 2: Convert to fraction form
    20,947.47/28,906.77 = 11,515.96/x
  3. Step 3: Cross multiply
    20,947.47x = 28,906.77 × 11,515.96
  4. Step 4: Simplify right side
    20,947.47x = 332,889,207.05
  5. Step 5: Solve for x
    x = 332,889,207.05/20,947.47
  6. Step 6: Final answer
    x = 15,891.62

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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.