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Finding the Fourth Proportional to 5,393.76, 8,091.52 and 2,620.60

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Solution

The fourth proportional to 5,393.76, 8,091.52 and 2,620.60 is: 3,931.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,393.76 : 8,091.52 = 2,620.60 : x
  2. Step 2: Convert to fraction form
    5,393.76/8,091.52 = 2,620.60/x
  3. Step 3: Cross multiply
    5,393.76x = 8,091.52 × 2,620.60
  4. Step 4: Simplify right side
    5,393.76x = 21,204,637.31
  5. Step 5: Solve for x
    x = 21,204,637.31/5,393.76
  6. Step 6: Final answer
    x = 3,931.33

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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.