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Finding the Fourth Proportional to 18,229.68, 25,157.88 and 11,154

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Solution

The fourth proportional to 18,229.68, 25,157.88 and 11,154 is: 15,393.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,229.68 : 25,157.88 = 11,154 : x
  2. Step 2: Convert to fraction form
    18,229.68/25,157.88 = 11,154/x
  3. Step 3: Cross multiply
    18,229.68x = 25,157.88 × 11,154
  4. Step 4: Simplify right side
    18,229.68x = 280,610,993.52
  5. Step 5: Solve for x
    x = 280,610,993.52/18,229.68
  6. Step 6: Final answer
    x = 15,393.08

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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.