Home / 20,998.52-28,979.60-11,568.76

Finding the Fourth Proportional to 20,998.52, 28,979.60 and 11,568.76

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Solution

The fourth proportional to 20,998.52, 28,979.60 and 11,568.76 is: 15,965.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,998.52 : 28,979.60 = 11,568.76 : x
  2. Step 2: Convert to fraction form
    20,998.52/28,979.60 = 11,568.76/x
  3. Step 3: Cross multiply
    20,998.52x = 28,979.60 × 11,568.76
  4. Step 4: Simplify right side
    20,998.52x = 335,258,037.30
  5. Step 5: Solve for x
    x = 335,258,037.30/20,998.52
  6. Step 6: Final answer
    x = 15,965.79

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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.