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Finding the Fourth Proportional to 20,012.85, 30,019.88 and 6,865.03

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Solution

The fourth proportional to 20,012.85, 30,019.88 and 6,865.03 is: 10,297.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,012.85 : 30,019.88 = 6,865.03 : x
  2. Step 2: Convert to fraction form
    20,012.85/30,019.88 = 6,865.03/x
  3. Step 3: Cross multiply
    20,012.85x = 30,019.88 × 6,865.03
  4. Step 4: Simplify right side
    20,012.85x = 206,087,431.48
  5. Step 5: Solve for x
    x = 206,087,431.48/20,012.85
  6. Step 6: Final answer
    x = 10,297.76

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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.