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Finding the Fourth Proportional to 5,679.28, 8,520 and 2,757.34

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Solution

The fourth proportional to 5,679.28, 8,520 and 2,757.34 is: 4,136.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,679.28 : 8,520 = 2,757.34 : x
  2. Step 2: Convert to fraction form
    5,679.28/8,520 = 2,757.34/x
  3. Step 3: Cross multiply
    5,679.28x = 8,520 × 2,757.34
  4. Step 4: Simplify right side
    5,679.28x = 23,492,536.80
  5. Step 5: Solve for x
    x = 23,492,536.80/5,679.28
  6. Step 6: Final answer
    x = 4,136.53

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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.