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Finding the Fourth Proportional to 7,991.49, 11,028.11 and 4,454.49

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Solution

The fourth proportional to 7,991.49, 11,028.11 and 4,454.49 is: 6,147.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,991.49 : 11,028.11 = 4,454.49 : x
  2. Step 2: Convert to fraction form
    7,991.49/11,028.11 = 4,454.49/x
  3. Step 3: Cross multiply
    7,991.49x = 11,028.11 × 4,454.49
  4. Step 4: Simplify right side
    7,991.49x = 49,124,583.44
  5. Step 5: Solve for x
    x = 49,124,583.44/7,991.49
  6. Step 6: Final answer
    x = 6,147.11

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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.