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Finding the Fourth Proportional to 18,928.80, 26,102.16 and 18,499.68

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Solution

The fourth proportional to 18,928.80, 26,102.16 and 18,499.68 is: 25,510.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,928.80 : 26,102.16 = 18,499.68 : x
  2. Step 2: Convert to fraction form
    18,928.80/26,102.16 = 18,499.68/x
  3. Step 3: Cross multiply
    18,928.80x = 26,102.16 × 18,499.68
  4. Step 4: Simplify right side
    18,928.80x = 482,881,607.31
  5. Step 5: Solve for x
    x = 482,881,607.31/18,928.80
  6. Step 6: Final answer
    x = 25,510.42

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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.