Home / 20,644.20-28,488.15-11,212.56

Finding the Fourth Proportional to 20,644.20, 28,488.15 and 11,212.56

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Solution

The fourth proportional to 20,644.20, 28,488.15 and 11,212.56 is: 15,472.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,644.20 : 28,488.15 = 11,212.56 : x
  2. Step 2: Convert to fraction form
    20,644.20/28,488.15 = 11,212.56/x
  3. Step 3: Cross multiply
    20,644.20x = 28,488.15 × 11,212.56
  4. Step 4: Simplify right side
    20,644.20x = 319,425,091.16
  5. Step 5: Solve for x
    x = 319,425,091.16/20,644.20
  6. Step 6: Final answer
    x = 15,472.87

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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.