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Finding the Fourth Proportional to 7,279.07, 10,911.03 and 4,939.28

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Solution

The fourth proportional to 7,279.07, 10,911.03 and 4,939.28 is: 7,403.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,279.07 : 10,911.03 = 4,939.28 : x
  2. Step 2: Convert to fraction form
    7,279.07/10,911.03 = 4,939.28/x
  3. Step 3: Cross multiply
    7,279.07x = 10,911.03 × 4,939.28
  4. Step 4: Simplify right side
    7,279.07x = 53,892,607.56
  5. Step 5: Solve for x
    x = 53,892,607.56/7,279.07
  6. Step 6: Final answer
    x = 7,403.78

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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.