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Finding the Fourth Proportional to 8,379.36, 12,571.10 and 5,918.98

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Solution

The fourth proportional to 8,379.36, 12,571.10 and 5,918.98 is: 8,879.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,379.36 : 12,571.10 = 5,918.98 : x
  2. Step 2: Convert to fraction form
    8,379.36/12,571.10 = 5,918.98/x
  3. Step 3: Cross multiply
    8,379.36x = 12,571.10 × 5,918.98
  4. Step 4: Simplify right side
    8,379.36x = 74,408,089.48
  5. Step 5: Solve for x
    x = 74,408,089.48/8,379.36
  6. Step 6: Final answer
    x = 8,879.93

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Why These Related Problems?

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