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Finding the Fourth Proportional to 18,428.67, 25,431.57 and 10,045.17

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Solution

The fourth proportional to 18,428.67, 25,431.57 and 10,045.17 is: 13,862.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,428.67 : 25,431.57 = 10,045.17 : x
  2. Step 2: Convert to fraction form
    18,428.67/25,431.57 = 10,045.17/x
  3. Step 3: Cross multiply
    18,428.67x = 25,431.57 × 10,045.17
  4. Step 4: Simplify right side
    18,428.67x = 255,464,444.02
  5. Step 5: Solve for x
    x = 255,464,444.02/18,428.67
  6. Step 6: Final answer
    x = 13,862.34

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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.