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Finding the Fourth Proportional to 8,195.70, 12,286.35 and 2,928.18

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Solution

The fourth proportional to 8,195.70, 12,286.35 and 2,928.18 is: 4,389.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,195.70 : 12,286.35 = 2,928.18 : x
  2. Step 2: Convert to fraction form
    8,195.70/12,286.35 = 2,928.18/x
  3. Step 3: Cross multiply
    8,195.70x = 12,286.35 × 2,928.18
  4. Step 4: Simplify right side
    8,195.70x = 35,976,644.34
  5. Step 5: Solve for x
    x = 35,976,644.34/8,195.70
  6. Step 6: Final answer
    x = 4,389.70

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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.