Home / 6,919.64-10,379.38-1,989.32

Finding the Fourth Proportional to 6,919.64, 10,379.38 and 1,989.32

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Solution

The fourth proportional to 6,919.64, 10,379.38 and 1,989.32 is: 2,983.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,919.64 : 10,379.38 = 1,989.32 : x
  2. Step 2: Convert to fraction form
    6,919.64/10,379.38 = 1,989.32/x
  3. Step 3: Cross multiply
    6,919.64x = 10,379.38 × 1,989.32
  4. Step 4: Simplify right side
    6,919.64x = 20,647,908.22
  5. Step 5: Solve for x
    x = 20,647,908.22/6,919.64
  6. Step 6: Final answer
    x = 2,983.96

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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.