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Finding the Fourth Proportional to 8,279.32, 12,420.21 and 2,733.25

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Solution

The fourth proportional to 8,279.32, 12,420.21 and 2,733.25 is: 4,100.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,279.32 : 12,420.21 = 2,733.25 : x
  2. Step 2: Convert to fraction form
    8,279.32/12,420.21 = 2,733.25/x
  3. Step 3: Cross multiply
    8,279.32x = 12,420.21 × 2,733.25
  4. Step 4: Simplify right side
    8,279.32x = 33,947,564.76
  5. Step 5: Solve for x
    x = 33,947,564.76/8,279.32
  6. Step 6: Final answer
    x = 4,100.28

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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.