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Finding the Fourth Proportional to 8,906.22, 13,363.79 and 3,979.40

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Solution

The fourth proportional to 8,906.22, 13,363.79 and 3,979.40 is: 5,971.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,906.22 : 13,363.79 = 3,979.40 : x
  2. Step 2: Convert to fraction form
    8,906.22/13,363.79 = 3,979.40/x
  3. Step 3: Cross multiply
    8,906.22x = 13,363.79 × 3,979.40
  4. Step 4: Simplify right side
    8,906.22x = 53,179,779.21
  5. Step 5: Solve for x
    x = 53,179,779.21/8,906.22
  6. Step 6: Final answer
    x = 5,971.08

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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.