Home / 6,919.90-10,381.44-1,989.58

Finding the Fourth Proportional to 6,919.90, 10,381.44 and 1,989.58

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Solution

The fourth proportional to 6,919.90, 10,381.44 and 1,989.58 is: 2,984.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,919.90 : 10,381.44 = 1,989.58 : x
  2. Step 2: Convert to fraction form
    6,919.90/10,381.44 = 1,989.58/x
  3. Step 3: Cross multiply
    6,919.90x = 10,381.44 × 1,989.58
  4. Step 4: Simplify right side
    6,919.90x = 20,654,705.40
  5. Step 5: Solve for x
    x = 20,654,705.40/6,919.90
  6. Step 6: Final answer
    x = 2,984.83

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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.