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Finding the Fourth Proportional to 15,062.73, 20,786.22 and 8,689.33

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Solution

The fourth proportional to 15,062.73, 20,786.22 and 8,689.33 is: 11,991.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,062.73 : 20,786.22 = 8,689.33 : x
  2. Step 2: Convert to fraction form
    15,062.73/20,786.22 = 8,689.33/x
  3. Step 3: Cross multiply
    15,062.73x = 20,786.22 × 8,689.33
  4. Step 4: Simplify right side
    15,062.73x = 180,618,234.09
  5. Step 5: Solve for x
    x = 180,618,234.09/15,062.73
  6. Step 6: Final answer
    x = 11,991.07

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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.