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Finding the Fourth Proportional to 6,868.62, 9,479.88 and 3,885.38

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Solution

The fourth proportional to 6,868.62, 9,479.88 and 3,885.38 is: 5,362.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,868.62 : 9,479.88 = 3,885.38 : x
  2. Step 2: Convert to fraction form
    6,868.62/9,479.88 = 3,885.38/x
  3. Step 3: Cross multiply
    6,868.62x = 9,479.88 × 3,885.38
  4. Step 4: Simplify right side
    6,868.62x = 36,832,936.15
  5. Step 5: Solve for x
    x = 36,832,936.15/6,868.62
  6. Step 6: Final answer
    x = 5,362.49

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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.