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Finding the Fourth Proportional to 13,483.90, 18,616.44 and 8,705.99

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Solution

The fourth proportional to 13,483.90, 18,616.44 and 8,705.99 is: 12,019.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,483.90 : 18,616.44 = 8,705.99 : x
  2. Step 2: Convert to fraction form
    13,483.90/18,616.44 = 8,705.99/x
  3. Step 3: Cross multiply
    13,483.90x = 18,616.44 × 8,705.99
  4. Step 4: Simplify right side
    13,483.90x = 162,074,540.48
  5. Step 5: Solve for x
    x = 162,074,540.48/13,483.90
  6. Step 6: Final answer
    x = 12,019.86

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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.