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Finding the Fourth Proportional to 20,672.52, 31,007.68 and 5,879.49

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Solution

The fourth proportional to 20,672.52, 31,007.68 and 5,879.49 is: 8,818.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,672.52 : 31,007.68 = 5,879.49 : x
  2. Step 2: Convert to fraction form
    20,672.52/31,007.68 = 5,879.49/x
  3. Step 3: Cross multiply
    20,672.52x = 31,007.68 × 5,879.49
  4. Step 4: Simplify right side
    20,672.52x = 182,309,344.48
  5. Step 5: Solve for x
    x = 182,309,344.48/20,672.52
  6. Step 6: Final answer
    x = 8,818.92

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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.