Home / 20,078.88-27,709.46-11,125.54

Finding the Fourth Proportional to 20,078.88, 27,709.46 and 11,125.54

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Solution

The fourth proportional to 20,078.88, 27,709.46 and 11,125.54 is: 15,353.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,078.88 : 27,709.46 = 11,125.54 : x
  2. Step 2: Convert to fraction form
    20,078.88/27,709.46 = 11,125.54/x
  3. Step 3: Cross multiply
    20,078.88x = 27,709.46 × 11,125.54
  4. Step 4: Simplify right side
    20,078.88x = 308,282,705.61
  5. Step 5: Solve for x
    x = 308,282,705.61/20,078.88
  6. Step 6: Final answer
    x = 15,353.58

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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.