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Finding the Fourth Proportional to 13,561.92, 20,315.16 and 10,055.88

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Solution

The fourth proportional to 13,561.92, 20,315.16 and 10,055.88 is: 15,063.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,561.92 : 20,315.16 = 10,055.88 : x
  2. Step 2: Convert to fraction form
    13,561.92/20,315.16 = 10,055.88/x
  3. Step 3: Cross multiply
    13,561.92x = 20,315.16 × 10,055.88
  4. Step 4: Simplify right side
    13,561.92x = 204,286,811.14
  5. Step 5: Solve for x
    x = 204,286,811.14/13,561.92
  6. Step 6: Final answer
    x = 15,063.27

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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.