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Finding the Fourth Proportional to 18,814.41, 25,981.41 and 12,111.65

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Solution

The fourth proportional to 18,814.41, 25,981.41 and 12,111.65 is: 16,725.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,814.41 : 25,981.41 = 12,111.65 : x
  2. Step 2: Convert to fraction form
    18,814.41/25,981.41 = 12,111.65/x
  3. Step 3: Cross multiply
    18,814.41x = 25,981.41 × 12,111.65
  4. Step 4: Simplify right side
    18,814.41x = 314,677,683.87
  5. Step 5: Solve for x
    x = 314,677,683.87/18,814.41
  6. Step 6: Final answer
    x = 16,725.35

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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.