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Finding the Fourth Proportional to 8,618.97, 12,902.94 and 5,321.46

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Solution

The fourth proportional to 8,618.97, 12,902.94 and 5,321.46 is: 7,966.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,618.97 : 12,902.94 = 5,321.46 : x
  2. Step 2: Convert to fraction form
    8,618.97/12,902.94 = 5,321.46/x
  3. Step 3: Cross multiply
    8,618.97x = 12,902.94 × 5,321.46
  4. Step 4: Simplify right side
    8,618.97x = 68,662,479.09
  5. Step 5: Solve for x
    x = 68,662,479.09/8,618.97
  6. Step 6: Final answer
    x = 7,966.44

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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.