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Finding the Fourth Proportional to 11,879.88, 16,379.34 and 7,623.43

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Solution

The fourth proportional to 11,879.88, 16,379.34 and 7,623.43 is: 10,510.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,879.88 : 16,379.34 = 7,623.43 : x
  2. Step 2: Convert to fraction form
    11,879.88/16,379.34 = 7,623.43/x
  3. Step 3: Cross multiply
    11,879.88x = 16,379.34 × 7,623.43
  4. Step 4: Simplify right side
    11,879.88x = 124,866,751.94
  5. Step 5: Solve for x
    x = 124,866,751.94/11,879.88
  6. Step 6: Final answer
    x = 10,510.78

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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.