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Finding the Fourth Proportional to 31,168.86, 43,013.34 and 17,021.94

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Solution

The fourth proportional to 31,168.86, 43,013.34 and 17,021.94 is: 23,490.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,168.86 : 43,013.34 = 17,021.94 : x
  2. Step 2: Convert to fraction form
    31,168.86/43,013.34 = 17,021.94/x
  3. Step 3: Cross multiply
    31,168.86x = 43,013.34 × 17,021.94
  4. Step 4: Simplify right side
    31,168.86x = 732,170,492.68
  5. Step 5: Solve for x
    x = 732,170,492.68/31,168.86
  6. Step 6: Final answer
    x = 23,490.45

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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.