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Finding the Fourth Proportional to 18,986.94, 26,192.04 and 12,611.82

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Solution

The fourth proportional to 18,986.94, 26,192.04 and 12,611.82 is: 17,397.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,986.94 : 26,192.04 = 12,611.82 : x
  2. Step 2: Convert to fraction form
    18,986.94/26,192.04 = 12,611.82/x
  3. Step 3: Cross multiply
    18,986.94x = 26,192.04 × 12,611.82
  4. Step 4: Simplify right side
    18,986.94x = 330,329,293.91
  5. Step 5: Solve for x
    x = 330,329,293.91/18,986.94
  6. Step 6: Final answer
    x = 17,397.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.