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Finding the Fourth Proportional to 20,705.02, 28,568.07 and 11,750.50

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Solution

The fourth proportional to 20,705.02, 28,568.07 and 11,750.50 is: 16,212.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,705.02 : 28,568.07 = 11,750.50 : x
  2. Step 2: Convert to fraction form
    20,705.02/28,568.07 = 11,750.50/x
  3. Step 3: Cross multiply
    20,705.02x = 28,568.07 × 11,750.50
  4. Step 4: Simplify right side
    20,705.02x = 335,689,106.54
  5. Step 5: Solve for x
    x = 335,689,106.54/20,705.02
  6. Step 6: Final answer
    x = 16,212.93

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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.