Home / 20,857.77-28,784.30-11,906.73

Finding the Fourth Proportional to 20,857.77, 28,784.30 and 11,906.73

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Solution

The fourth proportional to 20,857.77, 28,784.30 and 11,906.73 is: 16,431.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,857.77 : 28,784.30 = 11,906.73 : x
  2. Step 2: Convert to fraction form
    20,857.77/28,784.30 = 11,906.73/x
  3. Step 3: Cross multiply
    20,857.77x = 28,784.30 × 11,906.73
  4. Step 4: Simplify right side
    20,857.77x = 342,726,828.81
  5. Step 5: Solve for x
    x = 342,726,828.81/20,857.77
  6. Step 6: Final answer
    x = 16,431.61

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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.