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Finding the Fourth Proportional to 11,409.81, 17,111.44 and 4,389.36

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Solution

The fourth proportional to 11,409.81, 17,111.44 and 4,389.36 is: 6,582.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,409.81 : 17,111.44 = 4,389.36 : x
  2. Step 2: Convert to fraction form
    11,409.81/17,111.44 = 4,389.36/x
  3. Step 3: Cross multiply
    11,409.81x = 17,111.44 × 4,389.36
  4. Step 4: Simplify right side
    11,409.81x = 75,108,270.28
  5. Step 5: Solve for x
    x = 75,108,270.28/11,409.81
  6. Step 6: Final answer
    x = 6,582.78

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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.