Home / 7,919.37-11,880.41-2,989.71

Finding the Fourth Proportional to 7,919.37, 11,880.41 and 2,989.71

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Solution

The fourth proportional to 7,919.37, 11,880.41 and 2,989.71 is: 4,485.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,919.37 : 11,880.41 = 2,989.71 : x
  2. Step 2: Convert to fraction form
    7,919.37/11,880.41 = 2,989.71/x
  3. Step 3: Cross multiply
    7,919.37x = 11,880.41 × 2,989.71
  4. Step 4: Simplify right side
    7,919.37x = 35,518,965.63
  5. Step 5: Solve for x
    x = 35,518,965.63/7,919.37
  6. Step 6: Final answer
    x = 4,485.07

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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.