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Finding the Fourth Proportional to 31,186.96, 43,038.90 and 17,040.70

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Solution

The fourth proportional to 31,186.96, 43,038.90 and 17,040.70 is: 23,516.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,186.96 : 43,038.90 = 17,040.70 : x
  2. Step 2: Convert to fraction form
    31,186.96/43,038.90 = 17,040.70/x
  3. Step 3: Cross multiply
    31,186.96x = 43,038.90 × 17,040.70
  4. Step 4: Simplify right side
    31,186.96x = 733,412,983.23
  5. Step 5: Solve for x
    x = 733,412,983.23/31,186.96
  6. Step 6: Final answer
    x = 23,516.66

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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.