Home / 20,864.52-31,295.97-8,380.80

Finding the Fourth Proportional to 20,864.52, 31,295.97 and 8,380.80

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Solution

The fourth proportional to 20,864.52, 31,295.97 and 8,380.80 is: 12,570.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,864.52 : 31,295.97 = 8,380.80 : x
  2. Step 2: Convert to fraction form
    20,864.52/31,295.97 = 8,380.80/x
  3. Step 3: Cross multiply
    20,864.52x = 31,295.97 × 8,380.80
  4. Step 4: Simplify right side
    20,864.52x = 262,285,265.38
  5. Step 5: Solve for x
    x = 262,285,265.38/20,864.52
  6. Step 6: Final answer
    x = 12,570.87

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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.