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Finding the Fourth Proportional to 8,660.50, 12,990.20 and 3,395.30

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Solution

The fourth proportional to 8,660.50, 12,990.20 and 3,395.30 is: 5,092.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,660.50 : 12,990.20 = 3,395.30 : x
  2. Step 2: Convert to fraction form
    8,660.50/12,990.20 = 3,395.30/x
  3. Step 3: Cross multiply
    8,660.50x = 12,990.20 × 3,395.30
  4. Step 4: Simplify right side
    8,660.50x = 44,105,626.06
  5. Step 5: Solve for x
    x = 44,105,626.06/8,660.50
  6. Step 6: Final answer
    x = 5,092.73

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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.