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Finding the Fourth Proportional to 21,718.52, 32,574.34 and 8,389.54

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Solution

The fourth proportional to 21,718.52, 32,574.34 and 8,389.54 is: 12,582.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,718.52 : 32,574.34 = 8,389.54 : x
  2. Step 2: Convert to fraction form
    21,718.52/32,574.34 = 8,389.54/x
  3. Step 3: Cross multiply
    21,718.52x = 32,574.34 × 8,389.54
  4. Step 4: Simplify right side
    21,718.52x = 273,283,728.40
  5. Step 5: Solve for x
    x = 273,283,728.40/21,718.52
  6. Step 6: Final answer
    x = 12,582.98

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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.