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Finding the Fourth Proportional to 18,693.12, 25,830.72 and 17,781.96

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Solution

The fourth proportional to 18,693.12, 25,830.72 and 17,781.96 is: 24,571.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,693.12 : 25,830.72 = 17,781.96 : x
  2. Step 2: Convert to fraction form
    18,693.12/25,830.72 = 17,781.96/x
  3. Step 3: Cross multiply
    18,693.12x = 25,830.72 × 17,781.96
  4. Step 4: Simplify right side
    18,693.12x = 459,320,829.81
  5. Step 5: Solve for x
    x = 459,320,829.81/18,693.12
  6. Step 6: Final answer
    x = 24,571.65

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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.