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Finding the Fourth Proportional to 8,679.80, 11,983.46 and 6,686.52

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Solution

The fourth proportional to 8,679.80, 11,983.46 and 6,686.52 is: 9,231.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.80 : 11,983.46 = 6,686.52 : x
  2. Step 2: Convert to fraction form
    8,679.80/11,983.46 = 6,686.52/x
  3. Step 3: Cross multiply
    8,679.80x = 11,983.46 × 6,686.52
  4. Step 4: Simplify right side
    8,679.80x = 80,127,611.53
  5. Step 5: Solve for x
    x = 80,127,611.53/8,679.80
  6. Step 6: Final answer
    x = 9,231.51

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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.