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Finding the Fourth Proportional to 18,809.91, 25,956.70 and 10,851.66

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Solution

The fourth proportional to 18,809.91, 25,956.70 and 10,851.66 is: 14,974.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,809.91 : 25,956.70 = 10,851.66 : x
  2. Step 2: Convert to fraction form
    18,809.91/25,956.70 = 10,851.66/x
  3. Step 3: Cross multiply
    18,809.91x = 25,956.70 × 10,851.66
  4. Step 4: Simplify right side
    18,809.91x = 281,673,283.12
  5. Step 5: Solve for x
    x = 281,673,283.12/18,809.91
  6. Step 6: Final answer
    x = 14,974.73

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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.