Home / 6,919.46-10,378.84-1,989.05

Finding the Fourth Proportional to 6,919.46, 10,378.84 and 1,989.05

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Solution

The fourth proportional to 6,919.46, 10,378.84 and 1,989.05 is: 2,983.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,919.46 : 10,378.84 = 1,989.05 : x
  2. Step 2: Convert to fraction form
    6,919.46/10,378.84 = 1,989.05/x
  3. Step 3: Cross multiply
    6,919.46x = 10,378.84 × 1,989.05
  4. Step 4: Simplify right side
    6,919.46x = 20,644,031.70
  5. Step 5: Solve for x
    x = 20,644,031.70/6,919.46
  6. Step 6: Final answer
    x = 2,983.48

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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.