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Finding the Fourth Proportional to 7,879.83, 10,876.94 and 7,039.07

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Solution

The fourth proportional to 7,879.83, 10,876.94 and 7,039.07 is: 9,716.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,879.83 : 10,876.94 = 7,039.07 : x
  2. Step 2: Convert to fraction form
    7,879.83/10,876.94 = 7,039.07/x
  3. Step 3: Cross multiply
    7,879.83x = 10,876.94 × 7,039.07
  4. Step 4: Simplify right side
    7,879.83x = 76,563,542.05
  5. Step 5: Solve for x
    x = 76,563,542.05/7,879.83
  6. Step 6: Final answer
    x = 9,716.40

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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.