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Finding the Fourth Proportional to 10,999.94, 15,154.25 and 8,998.83

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Solution

The fourth proportional to 10,999.94, 15,154.25 and 8,998.83 is: 12,397.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,999.94 : 15,154.25 = 8,998.83 : x
  2. Step 2: Convert to fraction form
    10,999.94/15,154.25 = 8,998.83/x
  3. Step 3: Cross multiply
    10,999.94x = 15,154.25 × 8,998.83
  4. Step 4: Simplify right side
    10,999.94x = 136,370,474.53
  5. Step 5: Solve for x
    x = 136,370,474.53/10,999.94
  6. Step 6: Final answer
    x = 12,397.39

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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.