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Finding the Fourth Proportional to 7,711.80, 11,568.60 and 4,940.70

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Solution

The fourth proportional to 7,711.80, 11,568.60 and 4,940.70 is: 7,411.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,711.80 : 11,568.60 = 4,940.70 : x
  2. Step 2: Convert to fraction form
    7,711.80/11,568.60 = 4,940.70/x
  3. Step 3: Cross multiply
    7,711.80x = 11,568.60 × 4,940.70
  4. Step 4: Simplify right side
    7,711.80x = 57,156,982.02
  5. Step 5: Solve for x
    x = 57,156,982.02/7,711.80
  6. Step 6: Final answer
    x = 7,411.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.