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Finding the Fourth Proportional to 15,086.12, 20,818.82 and 8,371.82

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Solution

The fourth proportional to 15,086.12, 20,818.82 and 8,371.82 is: 11,553.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,086.12 : 20,818.82 = 8,371.82 : x
  2. Step 2: Convert to fraction form
    15,086.12/20,818.82 = 8,371.82/x
  3. Step 3: Cross multiply
    15,086.12x = 20,818.82 × 8,371.82
  4. Step 4: Simplify right side
    15,086.12x = 174,291,413.65
  5. Step 5: Solve for x
    x = 174,291,413.65/15,086.12
  6. Step 6: Final answer
    x = 11,553.10

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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.