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Finding the Fourth Proportional to 13,114.80, 19,672.20 and 5,722.80

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Solution

The fourth proportional to 13,114.80, 19,672.20 and 5,722.80 is: 8,584.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,114.80 : 19,672.20 = 5,722.80 : x
  2. Step 2: Convert to fraction form
    13,114.80/19,672.20 = 5,722.80/x
  3. Step 3: Cross multiply
    13,114.80x = 19,672.20 × 5,722.80
  4. Step 4: Simplify right side
    13,114.80x = 112,580,066.16
  5. Step 5: Solve for x
    x = 112,580,066.16/13,114.80
  6. Step 6: Final answer
    x = 8,584.20

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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.