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Finding the Fourth Proportional to 7,898.13, 11,843.05 and 3,945.15

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Solution

The fourth proportional to 7,898.13, 11,843.05 and 3,945.15 is: 5,915.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,898.13 : 11,843.05 = 3,945.15 : x
  2. Step 2: Convert to fraction form
    7,898.13/11,843.05 = 3,945.15/x
  3. Step 3: Cross multiply
    7,898.13x = 11,843.05 × 3,945.15
  4. Step 4: Simplify right side
    7,898.13x = 46,722,608.71
  5. Step 5: Solve for x
    x = 46,722,608.71/7,898.13
  6. Step 6: Final answer
    x = 5,915.65

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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.