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Finding the Fourth Proportional to 8,649.72, 12,971.64 and 2,804.88

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Solution

The fourth proportional to 8,649.72, 12,971.64 and 2,804.88 is: 4,206.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,649.72 : 12,971.64 = 2,804.88 : x
  2. Step 2: Convert to fraction form
    8,649.72/12,971.64 = 2,804.88/x
  3. Step 3: Cross multiply
    8,649.72x = 12,971.64 × 2,804.88
  4. Step 4: Simplify right side
    8,649.72x = 36,383,893.60
  5. Step 5: Solve for x
    x = 36,383,893.60/8,649.72
  6. Step 6: Final answer
    x = 4,206.37

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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.