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Finding the Fourth Proportional to 9,350.85, 12,908.84 and 5,815.20

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Solution

The fourth proportional to 9,350.85, 12,908.84 and 5,815.20 is: 8,027.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,350.85 : 12,908.84 = 5,815.20 : x
  2. Step 2: Convert to fraction form
    9,350.85/12,908.84 = 5,815.20/x
  3. Step 3: Cross multiply
    9,350.85x = 12,908.84 × 5,815.20
  4. Step 4: Simplify right side
    9,350.85x = 75,067,436.36
  5. Step 5: Solve for x
    x = 75,067,436.36/9,350.85
  6. Step 6: Final answer
    x = 8,027.88

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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.