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Finding the Fourth Proportional to 12,611.70, 18,895.68 and 8,392.61

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Solution

The fourth proportional to 12,611.70, 18,895.68 and 8,392.61 is: 12,574.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,611.70 : 18,895.68 = 8,392.61 : x
  2. Step 2: Convert to fraction form
    12,611.70/18,895.68 = 8,392.61/x
  3. Step 3: Cross multiply
    12,611.70x = 18,895.68 × 8,392.61
  4. Step 4: Simplify right side
    12,611.70x = 158,584,120.16
  5. Step 5: Solve for x
    x = 158,584,120.16/12,611.70
  6. Step 6: Final answer
    x = 12,574.37

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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.