Home / 20,140.90-30,211.35-8,450.98

Finding the Fourth Proportional to 20,140.90, 30,211.35 and 8,450.98

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Solution

The fourth proportional to 20,140.90, 30,211.35 and 8,450.98 is: 12,676.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,140.90 : 30,211.35 = 8,450.98 : x
  2. Step 2: Convert to fraction form
    20,140.90/30,211.35 = 8,450.98/x
  3. Step 3: Cross multiply
    20,140.90x = 30,211.35 × 8,450.98
  4. Step 4: Simplify right side
    20,140.90x = 255,315,514.62
  5. Step 5: Solve for x
    x = 255,315,514.62/20,140.90
  6. Step 6: Final answer
    x = 12,676.47

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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.