Home / 8,428.22-12,622.62-6,661.37

Finding the Fourth Proportional to 8,428.22, 12,622.62 and 6,661.37

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Solution

The fourth proportional to 8,428.22, 12,622.62 and 6,661.37 is: 9,976.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,428.22 : 12,622.62 = 6,661.37 : x
  2. Step 2: Convert to fraction form
    8,428.22/12,622.62 = 6,661.37/x
  3. Step 3: Cross multiply
    8,428.22x = 12,622.62 × 6,661.37
  4. Step 4: Simplify right side
    8,428.22x = 84,083,879.08
  5. Step 5: Solve for x
    x = 84,083,879.08/8,428.22
  6. Step 6: Final answer
    x = 9,976.48

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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.