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Finding the Fourth Proportional to 18,644.16, 27,961.76 and 5,492.96

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Solution

The fourth proportional to 18,644.16, 27,961.76 and 5,492.96 is: 8,238.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,644.16 : 27,961.76 = 5,492.96 : x
  2. Step 2: Convert to fraction form
    18,644.16/27,961.76 = 5,492.96/x
  3. Step 3: Cross multiply
    18,644.16x = 27,961.76 × 5,492.96
  4. Step 4: Simplify right side
    18,644.16x = 153,592,829.21
  5. Step 5: Solve for x
    x = 153,592,829.21/18,644.16
  6. Step 6: Final answer
    x = 8,238.12

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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.