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Finding the Fourth Proportional to 8,920.12, 13,379.64 and 2,764.12

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Solution

The fourth proportional to 8,920.12, 13,379.64 and 2,764.12 is: 4,146.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.12 : 13,379.64 = 2,764.12 : x
  2. Step 2: Convert to fraction form
    8,920.12/13,379.64 = 2,764.12/x
  3. Step 3: Cross multiply
    8,920.12x = 13,379.64 × 2,764.12
  4. Step 4: Simplify right side
    8,920.12x = 36,982,930.52
  5. Step 5: Solve for x
    x = 36,982,930.52/8,920.12
  6. Step 6: Final answer
    x = 4,146.01

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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.