Home / 20,129.45-27,777.76-11,176.25

Finding the Fourth Proportional to 20,129.45, 27,777.76 and 11,176.25

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Solution

The fourth proportional to 20,129.45, 27,777.76 and 11,176.25 is: 15,422.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,129.45 : 27,777.76 = 11,176.25 : x
  2. Step 2: Convert to fraction form
    20,129.45/27,777.76 = 11,176.25/x
  3. Step 3: Cross multiply
    20,129.45x = 27,777.76 × 11,176.25
  4. Step 4: Simplify right side
    20,129.45x = 310,451,231.70
  5. Step 5: Solve for x
    x = 310,451,231.70/20,129.45
  6. Step 6: Final answer
    x = 15,422.74

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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.