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Finding the Fourth Proportional to 8,873.72, 13,310.60 and 4,978.43

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Solution

The fourth proportional to 8,873.72, 13,310.60 and 4,978.43 is: 7,467.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,873.72 : 13,310.60 = 4,978.43 : x
  2. Step 2: Convert to fraction form
    8,873.72/13,310.60 = 4,978.43/x
  3. Step 3: Cross multiply
    8,873.72x = 13,310.60 × 4,978.43
  4. Step 4: Simplify right side
    8,873.72x = 66,265,848.83
  5. Step 5: Solve for x
    x = 66,265,848.83/8,873.72
  6. Step 6: Final answer
    x = 7,467.65

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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.