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Finding the Fourth Proportional to 13,455.51, 18,568.17 and 7,487.01

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Solution

The fourth proportional to 13,455.51, 18,568.17 and 7,487.01 is: 10,331.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,455.51 : 18,568.17 = 7,487.01 : x
  2. Step 2: Convert to fraction form
    13,455.51/18,568.17 = 7,487.01/x
  3. Step 3: Cross multiply
    13,455.51x = 18,568.17 × 7,487.01
  4. Step 4: Simplify right side
    13,455.51x = 139,020,074.47
  5. Step 5: Solve for x
    x = 139,020,074.47/13,455.51
  6. Step 6: Final answer
    x = 10,331.83

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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.