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Finding the Fourth Proportional to 6,879.40, 9,493.48 and 3,895.20

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Solution

The fourth proportional to 6,879.40, 9,493.48 and 3,895.20 is: 5,375.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,879.40 : 9,493.48 = 3,895.20 : x
  2. Step 2: Convert to fraction form
    6,879.40/9,493.48 = 3,895.20/x
  3. Step 3: Cross multiply
    6,879.40x = 9,493.48 × 3,895.20
  4. Step 4: Simplify right side
    6,879.40x = 36,979,003.30
  5. Step 5: Solve for x
    x = 36,979,003.30/6,879.40
  6. Step 6: Final answer
    x = 5,375.32

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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.