Home / 20,859.26-28,785.17-11,427.62

Finding the Fourth Proportional to 20,859.26, 28,785.17 and 11,427.62

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Solution

The fourth proportional to 20,859.26, 28,785.17 and 11,427.62 is: 15,769.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,859.26 : 28,785.17 = 11,427.62 : x
  2. Step 2: Convert to fraction form
    20,859.26/28,785.17 = 11,427.62/x
  3. Step 3: Cross multiply
    20,859.26x = 28,785.17 × 11,427.62
  4. Step 4: Simplify right side
    20,859.26x = 328,945,869.04
  5. Step 5: Solve for x
    x = 328,945,869.04/20,859.26
  6. Step 6: Final answer
    x = 15,769.78

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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.