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Finding the Fourth Proportional to 7,071.82, 9,759.13 and 3,928.01

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Solution

The fourth proportional to 7,071.82, 9,759.13 and 3,928.01 is: 5,420.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,071.82 : 9,759.13 = 3,928.01 : x
  2. Step 2: Convert to fraction form
    7,071.82/9,759.13 = 3,928.01/x
  3. Step 3: Cross multiply
    7,071.82x = 9,759.13 × 3,928.01
  4. Step 4: Simplify right side
    7,071.82x = 38,333,940.59
  5. Step 5: Solve for x
    x = 38,333,940.59/7,071.82
  6. Step 6: Final answer
    x = 5,420.66

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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.