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Finding the Fourth Proportional to 20,581.88, 30,872.82 and 7,434.27

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Solution

The fourth proportional to 20,581.88, 30,872.82 and 7,434.27 is: 11,151.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,581.88 : 30,872.82 = 7,434.27 : x
  2. Step 2: Convert to fraction form
    20,581.88/30,872.82 = 7,434.27/x
  3. Step 3: Cross multiply
    20,581.88x = 30,872.82 × 7,434.27
  4. Step 4: Simplify right side
    20,581.88x = 229,516,879.54
  5. Step 5: Solve for x
    x = 229,516,879.54/20,581.88
  6. Step 6: Final answer
    x = 11,151.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.