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Finding the Fourth Proportional to 7,915.91, 10,923.99 and 4,379.24

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Solution

The fourth proportional to 7,915.91, 10,923.99 and 4,379.24 is: 6,043.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,915.91 : 10,923.99 = 4,379.24 : x
  2. Step 2: Convert to fraction form
    7,915.91/10,923.99 = 4,379.24/x
  3. Step 3: Cross multiply
    7,915.91x = 10,923.99 × 4,379.24
  4. Step 4: Simplify right side
    7,915.91x = 47,838,773.97
  5. Step 5: Solve for x
    x = 47,838,773.97/7,915.91
  6. Step 6: Final answer
    x = 6,043.37

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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.