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Finding the Fourth Proportional to 8,443.89, 11,644.70 and 6,679.71

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Solution

The fourth proportional to 8,443.89, 11,644.70 and 6,679.71 is: 9,211.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,443.89 : 11,644.70 = 6,679.71 : x
  2. Step 2: Convert to fraction form
    8,443.89/11,644.70 = 6,679.71/x
  3. Step 3: Cross multiply
    8,443.89x = 11,644.70 × 6,679.71
  4. Step 4: Simplify right side
    8,443.89x = 77,783,185.64
  5. Step 5: Solve for x
    x = 77,783,185.64/8,443.89
  6. Step 6: Final answer
    x = 9,211.77

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1.5x scale

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.