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Finding the Fourth Proportional to 8,976.70, 13,467.21 and 2,820.70

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Solution

The fourth proportional to 8,976.70, 13,467.21 and 2,820.70 is: 4,231.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,976.70 : 13,467.21 = 2,820.70 : x
  2. Step 2: Convert to fraction form
    8,976.70/13,467.21 = 2,820.70/x
  3. Step 3: Cross multiply
    8,976.70x = 13,467.21 × 2,820.70
  4. Step 4: Simplify right side
    8,976.70x = 37,986,891.91
  5. Step 5: Solve for x
    x = 37,986,891.91/8,976.70
  6. Step 6: Final answer
    x = 4,231.72

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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.