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Finding the Fourth Proportional to 8,679.70, 13,019.57 and 3,136.96

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Solution

The fourth proportional to 8,679.70, 13,019.57 and 3,136.96 is: 4,705.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.70 : 13,019.57 = 3,136.96 : x
  2. Step 2: Convert to fraction form
    8,679.70/13,019.57 = 3,136.96/x
  3. Step 3: Cross multiply
    8,679.70x = 13,019.57 × 3,136.96
  4. Step 4: Simplify right side
    8,679.70x = 40,841,805.80
  5. Step 5: Solve for x
    x = 40,841,805.80/8,679.70
  6. Step 6: Final answer
    x = 4,705.44

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1.5x scale

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.