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Finding the Fourth Proportional to 8,065.80, 12,102.12 and 3,908.90

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Solution

The fourth proportional to 8,065.80, 12,102.12 and 3,908.90 is: 5,865.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,065.80 : 12,102.12 = 3,908.90 : x
  2. Step 2: Convert to fraction form
    8,065.80/12,102.12 = 3,908.90/x
  3. Step 3: Cross multiply
    8,065.80x = 12,102.12 × 3,908.90
  4. Step 4: Simplify right side
    8,065.80x = 47,305,976.87
  5. Step 5: Solve for x
    x = 47,305,976.87/8,065.80
  6. Step 6: Final answer
    x = 5,865.01

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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.