Home / 20,947.58-28,906.43-11,516.14

Finding the Fourth Proportional to 20,947.58, 28,906.43 and 11,516.14

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Solution

The fourth proportional to 20,947.58, 28,906.43 and 11,516.14 is: 15,891.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,947.58 : 28,906.43 = 11,516.14 : x
  2. Step 2: Convert to fraction form
    20,947.58/28,906.43 = 11,516.14/x
  3. Step 3: Cross multiply
    20,947.58x = 28,906.43 × 11,516.14
  4. Step 4: Simplify right side
    20,947.58x = 332,890,494.78
  5. Step 5: Solve for x
    x = 332,890,494.78/20,947.58
  6. Step 6: Final answer
    x = 15,891.60

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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.