Home / 7,880.68-10,879.78-5,231.71

Finding the Fourth Proportional to 7,880.68, 10,879.78 and 5,231.71

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Solution

The fourth proportional to 7,880.68, 10,879.78 and 5,231.71 is: 7,222.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,880.68 : 10,879.78 = 5,231.71 : x
  2. Step 2: Convert to fraction form
    7,880.68/10,879.78 = 5,231.71/x
  3. Step 3: Cross multiply
    7,880.68x = 10,879.78 × 5,231.71
  4. Step 4: Simplify right side
    7,880.68x = 56,919,813.55
  5. Step 5: Solve for x
    x = 56,919,813.55/7,880.68
  6. Step 6: Final answer
    x = 7,222.71

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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.