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Finding the Fourth Proportional to 18,819.65, 25,971.11 and 10,436.15

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Solution

The fourth proportional to 18,819.65, 25,971.11 and 10,436.15 is: 14,401.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.65 : 25,971.11 = 10,436.15 : x
  2. Step 2: Convert to fraction form
    18,819.65/25,971.11 = 10,436.15/x
  3. Step 3: Cross multiply
    18,819.65x = 25,971.11 × 10,436.15
  4. Step 4: Simplify right side
    18,819.65x = 271,038,295.86
  5. Step 5: Solve for x
    x = 271,038,295.86/18,819.65
  6. Step 6: Final answer
    x = 14,401.88

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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.