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Finding the Fourth Proportional to 25,860.99, 38,790.72 and 7,142.17

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Solution

The fourth proportional to 25,860.99, 38,790.72 and 7,142.17 is: 10,713.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,860.99 : 38,790.72 = 7,142.17 : x
  2. Step 2: Convert to fraction form
    25,860.99/38,790.72 = 7,142.17/x
  3. Step 3: Cross multiply
    25,860.99x = 38,790.72 × 7,142.17
  4. Step 4: Simplify right side
    25,860.99x = 277,049,916.66
  5. Step 5: Solve for x
    x = 277,049,916.66/25,860.99
  6. Step 6: Final answer
    x = 10,713.04

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.