Home / 20,129.75-27,778.52-11,177.02

Finding the Fourth Proportional to 20,129.75, 27,778.52 and 11,177.02

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Solution

The fourth proportional to 20,129.75, 27,778.52 and 11,177.02 is: 15,423.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,129.75 : 27,778.52 = 11,177.02 : x
  2. Step 2: Convert to fraction form
    20,129.75/27,778.52 = 11,177.02/x
  3. Step 3: Cross multiply
    20,129.75x = 27,778.52 × 11,177.02
  4. Step 4: Simplify right side
    20,129.75x = 310,481,021.32
  5. Step 5: Solve for x
    x = 310,481,021.32/20,129.75
  6. Step 6: Final answer
    x = 15,423.99

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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.