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Finding the Fourth Proportional to 8,379.72, 12,574.87 and 4,684.37

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Solution

The fourth proportional to 8,379.72, 12,574.87 and 4,684.37 is: 7,029.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,379.72 : 12,574.87 = 4,684.37 : x
  2. Step 2: Convert to fraction form
    8,379.72/12,574.87 = 4,684.37/x
  3. Step 3: Cross multiply
    8,379.72x = 12,574.87 × 4,684.37
  4. Step 4: Simplify right side
    8,379.72x = 58,905,363.51
  5. Step 5: Solve for x
    x = 58,905,363.51/8,379.72
  6. Step 6: Final answer
    x = 7,029.51

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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.