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Finding the Fourth Proportional to 25,126.61, 37,690.71 and 12,639.82

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Solution

The fourth proportional to 25,126.61, 37,690.71 and 12,639.82 is: 18,960.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,126.61 : 37,690.71 = 12,639.82 : x
  2. Step 2: Convert to fraction form
    25,126.61/37,690.71 = 12,639.82/x
  3. Step 3: Cross multiply
    25,126.61x = 37,690.71 × 12,639.82
  4. Step 4: Simplify right side
    25,126.61x = 476,403,790.07
  5. Step 5: Solve for x
    x = 476,403,790.07/25,126.61
  6. Step 6: Final answer
    x = 18,960.13

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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.