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Finding the Fourth Proportional to 6,879.78, 10,320.03 and 4,107.78

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Solution

The fourth proportional to 6,879.78, 10,320.03 and 4,107.78 is: 6,161.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,879.78 : 10,320.03 = 4,107.78 : x
  2. Step 2: Convert to fraction form
    6,879.78/10,320.03 = 4,107.78/x
  3. Step 3: Cross multiply
    6,879.78x = 10,320.03 × 4,107.78
  4. Step 4: Simplify right side
    6,879.78x = 42,392,412.83
  5. Step 5: Solve for x
    x = 42,392,412.83/6,879.78
  6. Step 6: Final answer
    x = 6,161.88

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1.5x scale

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.