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Finding the Fourth Proportional to 11,379.23, 15,696 and 7,550.78

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Solution

The fourth proportional to 11,379.23, 15,696 and 7,550.78 is: 10,415.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,379.23 : 15,696 = 7,550.78 : x
  2. Step 2: Convert to fraction form
    11,379.23/15,696 = 7,550.78/x
  3. Step 3: Cross multiply
    11,379.23x = 15,696 × 7,550.78
  4. Step 4: Simplify right side
    11,379.23x = 118,517,042.88
  5. Step 5: Solve for x
    x = 118,517,042.88/11,379.23
  6. Step 6: Final answer
    x = 10,415.21

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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.