Home / 20,839.05-28,761.99-11,885.70

Finding the Fourth Proportional to 20,839.05, 28,761.99 and 11,885.70

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Solution

The fourth proportional to 20,839.05, 28,761.99 and 11,885.70 is: 16,404.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,839.05 : 28,761.99 = 11,885.70 : x
  2. Step 2: Convert to fraction form
    20,839.05/28,761.99 = 11,885.70/x
  3. Step 3: Cross multiply
    20,839.05x = 28,761.99 × 11,885.70
  4. Step 4: Simplify right side
    20,839.05x = 341,856,384.54
  5. Step 5: Solve for x
    x = 341,856,384.54/20,839.05
  6. Step 6: Final answer
    x = 16,404.61

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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.