Home / 6,919.85-10,380.28-1,989.53

Finding the Fourth Proportional to 6,919.85, 10,380.28 and 1,989.53

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Solution

The fourth proportional to 6,919.85, 10,380.28 and 1,989.53 is: 2,984.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,919.85 : 10,380.28 = 1,989.53 : x
  2. Step 2: Convert to fraction form
    6,919.85/10,380.28 = 1,989.53/x
  3. Step 3: Cross multiply
    6,919.85x = 10,380.28 × 1,989.53
  4. Step 4: Simplify right side
    6,919.85x = 20,651,858.65
  5. Step 5: Solve for x
    x = 20,651,858.65/6,919.85
  6. Step 6: Final answer
    x = 2,984.44

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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.