Home / 20,857.24-28,784.37-11,906.56

Finding the Fourth Proportional to 20,857.24, 28,784.37 and 11,906.56

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Solution

The fourth proportional to 20,857.24, 28,784.37 and 11,906.56 is: 16,431.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,857.24 : 28,784.37 = 11,906.56 : x
  2. Step 2: Convert to fraction form
    20,857.24/28,784.37 = 11,906.56/x
  3. Step 3: Cross multiply
    20,857.24x = 28,784.37 × 11,906.56
  4. Step 4: Simplify right side
    20,857.24x = 342,722,828.47
  5. Step 5: Solve for x
    x = 342,722,828.47/20,857.24
  6. Step 6: Final answer
    x = 16,431.84

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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.