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Finding the Fourth Proportional to 6,940.40, 9,578.38 and 3,955.62

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Solution

The fourth proportional to 6,940.40, 9,578.38 and 3,955.62 is: 5,459.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,940.40 : 9,578.38 = 3,955.62 : x
  2. Step 2: Convert to fraction form
    6,940.40/9,578.38 = 3,955.62/x
  3. Step 3: Cross multiply
    6,940.40x = 9,578.38 × 3,955.62
  4. Step 4: Simplify right side
    6,940.40x = 37,888,431.50
  5. Step 5: Solve for x
    x = 37,888,431.50/6,940.40
  6. Step 6: Final answer
    x = 5,459.11

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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.