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Finding the Fourth Proportional to 8,879.87, 13,305.11 and 7,964.15

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Solution

The fourth proportional to 8,879.87, 13,305.11 and 7,964.15 is: 11,933.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,879.87 : 13,305.11 = 7,964.15 : x
  2. Step 2: Convert to fraction form
    8,879.87/13,305.11 = 7,964.15/x
  3. Step 3: Cross multiply
    8,879.87x = 13,305.11 × 7,964.15
  4. Step 4: Simplify right side
    8,879.87x = 105,963,785.46
  5. Step 5: Solve for x
    x = 105,963,785.46/8,879.87
  6. Step 6: Final answer
    x = 11,933.04

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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.