Home / 5,920.12-8,879.53-2,120.61

Finding the Fourth Proportional to 5,920.12, 8,879.53 and 2,120.61

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Solution

The fourth proportional to 5,920.12, 8,879.53 and 2,120.61 is: 3,180.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,920.12 : 8,879.53 = 2,120.61 : x
  2. Step 2: Convert to fraction form
    5,920.12/8,879.53 = 2,120.61/x
  3. Step 3: Cross multiply
    5,920.12x = 8,879.53 × 2,120.61
  4. Step 4: Simplify right side
    5,920.12x = 18,830,020.11
  5. Step 5: Solve for x
    x = 18,830,020.11/5,920.12
  6. Step 6: Final answer
    x = 3,180.68

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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.