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Finding the Fourth Proportional to 25,388.65, 35,025.31 and 15,311.49

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Solution

The fourth proportional to 25,388.65, 35,025.31 and 15,311.49 is: 21,123.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,388.65 : 35,025.31 = 15,311.49 : x
  2. Step 2: Convert to fraction form
    25,388.65/35,025.31 = 15,311.49/x
  3. Step 3: Cross multiply
    25,388.65x = 35,025.31 × 15,311.49
  4. Step 4: Simplify right side
    25,388.65x = 536,289,683.81
  5. Step 5: Solve for x
    x = 536,289,683.81/25,388.65
  6. Step 6: Final answer
    x = 21,123.21

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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.