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Finding the Fourth Proportional to 6,989.36, 9,645.27 and 3,845.54

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Solution

The fourth proportional to 6,989.36, 9,645.27 and 3,845.54 is: 5,306.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,989.36 : 9,645.27 = 3,845.54 : x
  2. Step 2: Convert to fraction form
    6,989.36/9,645.27 = 3,845.54/x
  3. Step 3: Cross multiply
    6,989.36x = 9,645.27 × 3,845.54
  4. Step 4: Simplify right side
    6,989.36x = 37,091,271.60
  5. Step 5: Solve for x
    x = 37,091,271.60/6,989.36
  6. Step 6: Final answer
    x = 5,306.82

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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.