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Finding the Fourth Proportional to 6,689, 9,230.82 and 3,896.36

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Solution

The fourth proportional to 6,689, 9,230.82 and 3,896.36 is: 5,376.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,689 : 9,230.82 = 3,896.36 : x
  2. Step 2: Convert to fraction form
    6,689/9,230.82 = 3,896.36/x
  3. Step 3: Cross multiply
    6,689x = 9,230.82 × 3,896.36
  4. Step 4: Simplify right side
    6,689x = 35,966,597.82
  5. Step 5: Solve for x
    x = 35,966,597.82/6,689
  6. Step 6: Final answer
    x = 5,376.98

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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.