Home / 8,679.22-13,008.98-3,989.53

Finding the Fourth Proportional to 8,679.22, 13,008.98 and 3,989.53

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Solution

The fourth proportional to 8,679.22, 13,008.98 and 3,989.53 is: 5,979.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.22 : 13,008.98 = 3,989.53 : x
  2. Step 2: Convert to fraction form
    8,679.22/13,008.98 = 3,989.53/x
  3. Step 3: Cross multiply
    8,679.22x = 13,008.98 × 3,989.53
  4. Step 4: Simplify right side
    8,679.22x = 51,899,776.73
  5. Step 5: Solve for x
    x = 51,899,776.73/8,679.22
  6. Step 6: Final answer
    x = 5,979.78

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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.