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Finding the Fourth Proportional to 6,990.75, 9,644.67 and 4,004.55

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Solution

The fourth proportional to 6,990.75, 9,644.67 and 4,004.55 is: 5,524.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,990.75 : 9,644.67 = 4,004.55 : x
  2. Step 2: Convert to fraction form
    6,990.75/9,644.67 = 4,004.55/x
  3. Step 3: Cross multiply
    6,990.75x = 9,644.67 × 4,004.55
  4. Step 4: Simplify right side
    6,990.75x = 38,622,563.25
  5. Step 5: Solve for x
    x = 38,622,563.25/6,990.75
  6. Step 6: Final answer
    x = 5,524.81

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1.5x scale

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.