Home / 20,471.66-28,250.61-11,979.62

Finding the Fourth Proportional to 20,471.66, 28,250.61 and 11,979.62

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Solution

The fourth proportional to 20,471.66, 28,250.61 and 11,979.62 is: 16,531.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,471.66 : 28,250.61 = 11,979.62 : x
  2. Step 2: Convert to fraction form
    20,471.66/28,250.61 = 11,979.62/x
  3. Step 3: Cross multiply
    20,471.66x = 28,250.61 × 11,979.62
  4. Step 4: Simplify right side
    20,471.66x = 338,431,572.57
  5. Step 5: Solve for x
    x = 338,431,572.57/20,471.66
  6. Step 6: Final answer
    x = 16,531.71

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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.