Home / 20,177.78-27,845.20-11,103.69

Finding the Fourth Proportional to 20,177.78, 27,845.20 and 11,103.69

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Solution

The fourth proportional to 20,177.78, 27,845.20 and 11,103.69 is: 15,323.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,177.78 : 27,845.20 = 11,103.69 : x
  2. Step 2: Convert to fraction form
    20,177.78/27,845.20 = 11,103.69/x
  3. Step 3: Cross multiply
    20,177.78x = 27,845.20 × 11,103.69
  4. Step 4: Simplify right side
    20,177.78x = 309,184,468.79
  5. Step 5: Solve for x
    x = 309,184,468.79/20,177.78
  6. Step 6: Final answer
    x = 15,323.02

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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.