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Finding the Fourth Proportional to 6,964.82, 9,611.21 and 3,980.93

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Solution

The fourth proportional to 6,964.82, 9,611.21 and 3,980.93 is: 5,493.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,964.82 : 9,611.21 = 3,980.93 : x
  2. Step 2: Convert to fraction form
    6,964.82/9,611.21 = 3,980.93/x
  3. Step 3: Cross multiply
    6,964.82x = 9,611.21 × 3,980.93
  4. Step 4: Simplify right side
    6,964.82x = 38,261,486.26
  5. Step 5: Solve for x
    x = 38,261,486.26/6,964.82
  6. Step 6: Final answer
    x = 5,493.54

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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.