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Finding the Fourth Proportional to 8,622.15, 12,949.62 and 5,358.05

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Solution

The fourth proportional to 8,622.15, 12,949.62 and 5,358.05 is: 8,047.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,622.15 : 12,949.62 = 5,358.05 : x
  2. Step 2: Convert to fraction form
    8,622.15/12,949.62 = 5,358.05/x
  3. Step 3: Cross multiply
    8,622.15x = 12,949.62 × 5,358.05
  4. Step 4: Simplify right side
    8,622.15x = 69,384,695.25
  5. Step 5: Solve for x
    x = 69,384,695.25/8,622.15
  6. Step 6: Final answer
    x = 8,047.26

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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.