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Finding the Fourth Proportional to 18,921.89, 26,114.25 and 10,424.88

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Solution

The fourth proportional to 18,921.89, 26,114.25 and 10,424.88 is: 14,387.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,921.89 : 26,114.25 = 10,424.88 : x
  2. Step 2: Convert to fraction form
    18,921.89/26,114.25 = 10,424.88/x
  3. Step 3: Cross multiply
    18,921.89x = 26,114.25 × 10,424.88
  4. Step 4: Simplify right side
    18,921.89x = 272,237,922.54
  5. Step 5: Solve for x
    x = 272,237,922.54/18,921.89
  6. Step 6: Final answer
    x = 14,387.46

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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.