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Finding the Fourth Proportional to 7,928.22, 10,940.94 and 4,391.40

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Solution

The fourth proportional to 7,928.22, 10,940.94 and 4,391.40 is: 6,060.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,928.22 : 10,940.94 = 4,391.40 : x
  2. Step 2: Convert to fraction form
    7,928.22/10,940.94 = 4,391.40/x
  3. Step 3: Cross multiply
    7,928.22x = 10,940.94 × 4,391.40
  4. Step 4: Simplify right side
    7,928.22x = 48,046,043.92
  5. Step 5: Solve for x
    x = 48,046,043.92/7,928.22
  6. Step 6: Final answer
    x = 6,060.13

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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.