Home / 20,081.76-27,711.72-11,129.16

Finding the Fourth Proportional to 20,081.76, 27,711.72 and 11,129.16

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Solution

The fourth proportional to 20,081.76, 27,711.72 and 11,129.16 is: 15,357.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,081.76 : 27,711.72 = 11,129.16 : x
  2. Step 2: Convert to fraction form
    20,081.76/27,711.72 = 11,129.16/x
  3. Step 3: Cross multiply
    20,081.76x = 27,711.72 × 11,129.16
  4. Step 4: Simplify right side
    20,081.76x = 308,408,165.76
  5. Step 5: Solve for x
    x = 308,408,165.76/20,081.76
  6. Step 6: Final answer
    x = 15,357.63

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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.