Home / 20,211.90-30,319.20-6,884.70

Finding the Fourth Proportional to 20,211.90, 30,319.20 and 6,884.70

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Solution

The fourth proportional to 20,211.90, 30,319.20 and 6,884.70 is: 10,327.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,211.90 : 30,319.20 = 6,884.70 : x
  2. Step 2: Convert to fraction form
    20,211.90/30,319.20 = 6,884.70/x
  3. Step 3: Cross multiply
    20,211.90x = 30,319.20 × 6,884.70
  4. Step 4: Simplify right side
    20,211.90x = 208,738,596.24
  5. Step 5: Solve for x
    x = 208,738,596.24/20,211.90
  6. Step 6: Final answer
    x = 10,327.51

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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.