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Finding the Fourth Proportional to 18,640.97, 27,915.99 and 14,193.84

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Solution

The fourth proportional to 18,640.97, 27,915.99 and 14,193.84 is: 21,256.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,640.97 : 27,915.99 = 14,193.84 : x
  2. Step 2: Convert to fraction form
    18,640.97/27,915.99 = 14,193.84/x
  3. Step 3: Cross multiply
    18,640.97x = 27,915.99 × 14,193.84
  4. Step 4: Simplify right side
    18,640.97x = 396,235,095.50
  5. Step 5: Solve for x
    x = 396,235,095.50/18,640.97
  6. Step 6: Final answer
    x = 21,256.15

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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.