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Finding the Fourth Proportional to 5,672.81, 8,508.02 and 2,161.60

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Solution

The fourth proportional to 5,672.81, 8,508.02 and 2,161.60 is: 3,241.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,672.81 : 8,508.02 = 2,161.60 : x
  2. Step 2: Convert to fraction form
    5,672.81/8,508.02 = 2,161.60/x
  3. Step 3: Cross multiply
    5,672.81x = 8,508.02 × 2,161.60
  4. Step 4: Simplify right side
    5,672.81x = 18,390,893.49
  5. Step 5: Solve for x
    x = 18,390,893.49/5,672.81
  6. Step 6: Final answer
    x = 3,241.94

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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.