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Finding the Fourth Proportional to 28,772.48, 39,706.80 and 16,197.68

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Solution

The fourth proportional to 28,772.48, 39,706.80 and 16,197.68 is: 22,353.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,772.48 : 39,706.80 = 16,197.68 : x
  2. Step 2: Convert to fraction form
    28,772.48/39,706.80 = 16,197.68/x
  3. Step 3: Cross multiply
    28,772.48x = 39,706.80 × 16,197.68
  4. Step 4: Simplify right side
    28,772.48x = 643,158,040.22
  5. Step 5: Solve for x
    x = 643,158,040.22/28,772.48
  6. Step 6: Final answer
    x = 22,353.24

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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.