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Finding the Fourth Proportional to 6,764, 9,335.60 and 3,820

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Solution

The fourth proportional to 6,764, 9,335.60 and 3,820 is: 5,272.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,764 : 9,335.60 = 3,820 : x
  2. Step 2: Convert to fraction form
    6,764/9,335.60 = 3,820/x
  3. Step 3: Cross multiply
    6,764x = 9,335.60 × 3,820
  4. Step 4: Simplify right side
    6,764x = 35,661,992
  5. Step 5: Solve for x
    x = 35,661,992/6,764
  6. Step 6: Final answer
    x = 5,272.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.