Home / 20,129.12-27,778.42-11,054.88

Finding the Fourth Proportional to 20,129.12, 27,778.42 and 11,054.88

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Solution

The fourth proportional to 20,129.12, 27,778.42 and 11,054.88 is: 15,255.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,129.12 : 27,778.42 = 11,054.88 : x
  2. Step 2: Convert to fraction form
    20,129.12/27,778.42 = 11,054.88/x
  3. Step 3: Cross multiply
    20,129.12x = 27,778.42 × 11,054.88
  4. Step 4: Simplify right side
    20,129.12x = 307,087,099.69
  5. Step 5: Solve for x
    x = 307,087,099.69/20,129.12
  6. Step 6: Final answer
    x = 15,255.86

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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.