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Finding the Fourth Proportional to 7,880.43, 10,879.44 and 5,231.46

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Solution

The fourth proportional to 7,880.43, 10,879.44 and 5,231.46 is: 7,222.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,880.43 : 10,879.44 = 5,231.46 : x
  2. Step 2: Convert to fraction form
    7,880.43/10,879.44 = 5,231.46/x
  3. Step 3: Cross multiply
    7,880.43x = 10,879.44 × 5,231.46
  4. Step 4: Simplify right side
    7,880.43x = 56,915,329.03
  5. Step 5: Solve for x
    x = 56,915,329.03/7,880.43
  6. Step 6: Final answer
    x = 7,222.36

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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.