Home / 20,081.86-27,713.20-11,129.51

Finding the Fourth Proportional to 20,081.86, 27,713.20 and 11,129.51

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Solution

The fourth proportional to 20,081.86, 27,713.20 and 11,129.51 is: 15,358.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,081.86 : 27,713.20 = 11,129.51 : x
  2. Step 2: Convert to fraction form
    20,081.86/27,713.20 = 11,129.51/x
  3. Step 3: Cross multiply
    20,081.86x = 27,713.20 × 11,129.51
  4. Step 4: Simplify right side
    20,081.86x = 308,434,336.53
  5. Step 5: Solve for x
    x = 308,434,336.53/20,081.86
  6. Step 6: Final answer
    x = 15,358.85

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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.