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Finding the Fourth Proportional to 8,871.88, 12,244.06 and 6,629.86

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Solution

The fourth proportional to 8,871.88, 12,244.06 and 6,629.86 is: 9,149.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,871.88 : 12,244.06 = 6,629.86 : x
  2. Step 2: Convert to fraction form
    8,871.88/12,244.06 = 6,629.86/x
  3. Step 3: Cross multiply
    8,871.88x = 12,244.06 × 6,629.86
  4. Step 4: Simplify right side
    8,871.88x = 81,176,403.63
  5. Step 5: Solve for x
    x = 81,176,403.63/8,871.88
  6. Step 6: Final answer
    x = 9,149.85

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Why These Related Problems?

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