Home / 20,078.20-27,709.03-11,125.52

Finding the Fourth Proportional to 20,078.20, 27,709.03 and 11,125.52

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Solution

The fourth proportional to 20,078.20, 27,709.03 and 11,125.52 is: 15,353.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,078.20 : 27,709.03 = 11,125.52 : x
  2. Step 2: Convert to fraction form
    20,078.20/27,709.03 = 11,125.52/x
  3. Step 3: Cross multiply
    20,078.20x = 27,709.03 × 11,125.52
  4. Step 4: Simplify right side
    20,078.20x = 308,277,201.09
  5. Step 5: Solve for x
    x = 308,277,201.09/20,078.20
  6. Step 6: Final answer
    x = 15,353.83

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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.