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Finding the Fourth Proportional to 8,279.58, 12,419.64 and 3,015.66

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Solution

The fourth proportional to 8,279.58, 12,419.64 and 3,015.66 is: 4,523.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,279.58 : 12,419.64 = 3,015.66 : x
  2. Step 2: Convert to fraction form
    8,279.58/12,419.64 = 3,015.66/x
  3. Step 3: Cross multiply
    8,279.58x = 12,419.64 × 3,015.66
  4. Step 4: Simplify right side
    8,279.58x = 37,453,411.56
  5. Step 5: Solve for x
    x = 37,453,411.56/8,279.58
  6. Step 6: Final answer
    x = 4,523.59

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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.