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Finding the Fourth Proportional to 20,066.94, 27,680.74 and 12,993.51

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Solution

The fourth proportional to 20,066.94, 27,680.74 and 12,993.51 is: 17,923.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,066.94 : 27,680.74 = 12,993.51 : x
  2. Step 2: Convert to fraction form
    20,066.94/27,680.74 = 12,993.51/x
  3. Step 3: Cross multiply
    20,066.94x = 27,680.74 × 12,993.51
  4. Step 4: Simplify right side
    20,066.94x = 359,670,043.32
  5. Step 5: Solve for x
    x = 359,670,043.32/20,066.94
  6. Step 6: Final answer
    x = 17,923.51

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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.