Home / 20,947.70-28,906.76-11,516.60

Finding the Fourth Proportional to 20,947.70, 28,906.76 and 11,516.60

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Solution

The fourth proportional to 20,947.70, 28,906.76 and 11,516.60 is: 15,892.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,947.70 : 28,906.76 = 11,516.60 : x
  2. Step 2: Convert to fraction form
    20,947.70/28,906.76 = 11,516.60/x
  3. Step 3: Cross multiply
    20,947.70x = 28,906.76 × 11,516.60
  4. Step 4: Simplify right side
    20,947.70x = 332,907,592.22
  5. Step 5: Solve for x
    x = 332,907,592.22/20,947.70
  6. Step 6: Final answer
    x = 15,892.32

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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.