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Finding the Fourth Proportional to 19,052.80, 28,579.20 and 16,428.40

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Solution

The fourth proportional to 19,052.80, 28,579.20 and 16,428.40 is: 24,642.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,052.80 : 28,579.20 = 16,428.40 : x
  2. Step 2: Convert to fraction form
    19,052.80/28,579.20 = 16,428.40/x
  3. Step 3: Cross multiply
    19,052.80x = 28,579.20 × 16,428.40
  4. Step 4: Simplify right side
    19,052.80x = 469,510,529.28
  5. Step 5: Solve for x
    x = 469,510,529.28/19,052.80
  6. Step 6: Final answer
    x = 24,642.60

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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.