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Finding the Fourth Proportional to 6,551.90, 9,040.22 and 3,898.79

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Solution

The fourth proportional to 6,551.90, 9,040.22 and 3,898.79 is: 5,379.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,551.90 : 9,040.22 = 3,898.79 : x
  2. Step 2: Convert to fraction form
    6,551.90/9,040.22 = 3,898.79/x
  3. Step 3: Cross multiply
    6,551.90x = 9,040.22 × 3,898.79
  4. Step 4: Simplify right side
    6,551.90x = 35,245,922.44
  5. Step 5: Solve for x
    x = 35,245,922.44/6,551.90
  6. Step 6: Final answer
    x = 5,379.49

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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.