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Finding the Fourth Proportional to 7,879.30, 10,879.77 and 5,366.68

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Solution

The fourth proportional to 7,879.30, 10,879.77 and 5,366.68 is: 7,410.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,879.30 : 10,879.77 = 5,366.68 : x
  2. Step 2: Convert to fraction form
    7,879.30/10,879.77 = 5,366.68/x
  3. Step 3: Cross multiply
    7,879.30x = 10,879.77 × 5,366.68
  4. Step 4: Simplify right side
    7,879.30x = 58,388,244.06
  5. Step 5: Solve for x
    x = 58,388,244.06/7,879.30
  6. Step 6: Final answer
    x = 7,410.33

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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.