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Finding the Fourth Proportional to 13,479.05, 18,593.88 and 8,172.74

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Solution

The fourth proportional to 13,479.05, 18,593.88 and 8,172.74 is: 11,274.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,479.05 : 18,593.88 = 8,172.74 : x
  2. Step 2: Convert to fraction form
    13,479.05/18,593.88 = 8,172.74/x
  3. Step 3: Cross multiply
    13,479.05x = 18,593.88 × 8,172.74
  4. Step 4: Simplify right side
    13,479.05x = 151,962,946.83
  5. Step 5: Solve for x
    x = 151,962,946.83/13,479.05
  6. Step 6: Final answer
    x = 11,274.01

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.