Home / 10,515.91-15,773.92-3,120.43

Finding the Fourth Proportional to 10,515.91, 15,773.92 and 3,120.43

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Solution

The fourth proportional to 10,515.91, 15,773.92 and 3,120.43 is: 4,680.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,515.91 : 15,773.92 = 3,120.43 : x
  2. Step 2: Convert to fraction form
    10,515.91/15,773.92 = 3,120.43/x
  3. Step 3: Cross multiply
    10,515.91x = 15,773.92 × 3,120.43
  4. Step 4: Simplify right side
    10,515.91x = 49,221,413.19
  5. Step 5: Solve for x
    x = 49,221,413.19/10,515.91
  6. Step 6: Final answer
    x = 4,680.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.