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Finding the Fourth Proportional to 8,858.72, 12,221.16 and 5,319.88

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Solution

The fourth proportional to 8,858.72, 12,221.16 and 5,319.88 is: 7,339.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,858.72 : 12,221.16 = 5,319.88 : x
  2. Step 2: Convert to fraction form
    8,858.72/12,221.16 = 5,319.88/x
  3. Step 3: Cross multiply
    8,858.72x = 12,221.16 × 5,319.88
  4. Step 4: Simplify right side
    8,858.72x = 65,015,043.56
  5. Step 5: Solve for x
    x = 65,015,043.56/8,858.72
  6. Step 6: Final answer
    x = 7,339.10

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.