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Finding the Fourth Proportional to 18,819.65, 25,905.92 and 16,266.24

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Solution

The fourth proportional to 18,819.65, 25,905.92 and 16,266.24 is: 22,391.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.65 : 25,905.92 = 16,266.24 : x
  2. Step 2: Convert to fraction form
    18,819.65/25,905.92 = 16,266.24/x
  3. Step 3: Cross multiply
    18,819.65x = 25,905.92 × 16,266.24
  4. Step 4: Simplify right side
    18,819.65x = 421,391,912.14
  5. Step 5: Solve for x
    x = 421,391,912.14/18,819.65
  6. Step 6: Final answer
    x = 22,391.07

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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.