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Finding the Fourth Proportional to 5,475.76, 8,213.64 and 1,371.76

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Solution

The fourth proportional to 5,475.76, 8,213.64 and 1,371.76 is: 2,057.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,475.76 : 8,213.64 = 1,371.76 : x
  2. Step 2: Convert to fraction form
    5,475.76/8,213.64 = 1,371.76/x
  3. Step 3: Cross multiply
    5,475.76x = 8,213.64 × 1,371.76
  4. Step 4: Simplify right side
    5,475.76x = 11,267,142.81
  5. Step 5: Solve for x
    x = 11,267,142.81/5,475.76
  6. Step 6: Final answer
    x = 2,057.64

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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.