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Finding the Fourth Proportional to 18,731.39, 25,822.50 and 11,556.51

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Solution

The fourth proportional to 18,731.39, 25,822.50 and 11,556.51 is: 15,931.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,731.39 : 25,822.50 = 11,556.51 : x
  2. Step 2: Convert to fraction form
    18,731.39/25,822.50 = 11,556.51/x
  3. Step 3: Cross multiply
    18,731.39x = 25,822.50 × 11,556.51
  4. Step 4: Simplify right side
    18,731.39x = 298,417,839.30
  5. Step 5: Solve for x
    x = 298,417,839.30/18,731.39
  6. Step 6: Final answer
    x = 15,931.43

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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.