Home / 20,947.72-28,909.40-11,516.44

Finding the Fourth Proportional to 20,947.72, 28,909.40 and 11,516.44

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Solution

The fourth proportional to 20,947.72, 28,909.40 and 11,516.44 is: 15,893.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,947.72 : 28,909.40 = 11,516.44 : x
  2. Step 2: Convert to fraction form
    20,947.72/28,909.40 = 11,516.44/x
  3. Step 3: Cross multiply
    20,947.72x = 28,909.40 × 11,516.44
  4. Step 4: Simplify right side
    20,947.72x = 332,933,370.54
  5. Step 5: Solve for x
    x = 332,933,370.54/20,947.72
  6. Step 6: Final answer
    x = 15,893.54

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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.