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Finding the Fourth Proportional to 7,920.07, 11,879.79 and 1,996.99

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Solution

The fourth proportional to 7,920.07, 11,879.79 and 1,996.99 is: 2,995.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920.07 : 11,879.79 = 1,996.99 : x
  2. Step 2: Convert to fraction form
    7,920.07/11,879.79 = 1,996.99/x
  3. Step 3: Cross multiply
    7,920.07x = 11,879.79 × 1,996.99
  4. Step 4: Simplify right side
    7,920.07x = 23,723,821.83
  5. Step 5: Solve for x
    x = 23,723,821.83/7,920.07
  6. Step 6: Final answer
    x = 2,995.41

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1.5x scale

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.