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Finding the Fourth Proportional to 23,681.78, 35,432.45 and 21,057.38

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Solution

The fourth proportional to 23,681.78, 35,432.45 and 21,057.38 is: 31,505.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,681.78 : 35,432.45 = 21,057.38 : x
  2. Step 2: Convert to fraction form
    23,681.78/35,432.45 = 21,057.38/x
  3. Step 3: Cross multiply
    23,681.78x = 35,432.45 × 21,057.38
  4. Step 4: Simplify right side
    23,681.78x = 746,114,611.82
  5. Step 5: Solve for x
    x = 746,114,611.82/23,681.78
  6. Step 6: Final answer
    x = 31,505.85

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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.