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Finding the Fourth Proportional to 6,939.46, 9,642.83 and 6,868.42

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Solution

The fourth proportional to 6,939.46, 9,642.83 and 6,868.42 is: 9,544.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,939.46 : 9,642.83 = 6,868.42 : x
  2. Step 2: Convert to fraction form
    6,939.46/9,642.83 = 6,868.42/x
  3. Step 3: Cross multiply
    6,939.46x = 9,642.83 × 6,868.42
  4. Step 4: Simplify right side
    6,939.46x = 66,231,006.43
  5. Step 5: Solve for x
    x = 66,231,006.43/6,939.46
  6. Step 6: Final answer
    x = 9,544.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.