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Finding the Fourth Proportional to 8,618.57, 12,869.46 and 6,843.65

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Solution

The fourth proportional to 8,618.57, 12,869.46 and 6,843.65 is: 10,219.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,618.57 : 12,869.46 = 6,843.65 : x
  2. Step 2: Convert to fraction form
    8,618.57/12,869.46 = 6,843.65/x
  3. Step 3: Cross multiply
    8,618.57x = 12,869.46 × 6,843.65
  4. Step 4: Simplify right side
    8,618.57x = 88,074,015.58
  5. Step 5: Solve for x
    x = 88,074,015.58/8,618.57
  6. Step 6: Final answer
    x = 10,219.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.