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Finding the Fourth Proportional to 13,191.60, 19,792.62 and 5,790.90

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Solution

The fourth proportional to 13,191.60, 19,792.62 and 5,790.90 is: 8,688.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,191.60 : 19,792.62 = 5,790.90 : x
  2. Step 2: Convert to fraction form
    13,191.60/19,792.62 = 5,790.90/x
  3. Step 3: Cross multiply
    13,191.60x = 19,792.62 × 5,790.90
  4. Step 4: Simplify right side
    13,191.60x = 114,617,083.16
  5. Step 5: Solve for x
    x = 114,617,083.16/13,191.60
  6. Step 6: Final answer
    x = 8,688.64

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.