Home / 20,081.79-27,712.94-11,129.44

Finding the Fourth Proportional to 20,081.79, 27,712.94 and 11,129.44

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Solution

The fourth proportional to 20,081.79, 27,712.94 and 11,129.44 is: 15,358.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,081.79 : 27,712.94 = 11,129.44 : x
  2. Step 2: Convert to fraction form
    20,081.79/27,712.94 = 11,129.44/x
  3. Step 3: Cross multiply
    20,081.79x = 27,712.94 × 11,129.44
  4. Step 4: Simplify right side
    20,081.79x = 308,429,391.01
  5. Step 5: Solve for x
    x = 308,429,391.01/20,081.79
  6. Step 6: Final answer
    x = 15,358.66

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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.