Home / 8,140.75-12,211.60-3,143.15

Finding the Fourth Proportional to 8,140.75, 12,211.60 and 3,143.15

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Solution

The fourth proportional to 8,140.75, 12,211.60 and 3,143.15 is: 4,714.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,140.75 : 12,211.60 = 3,143.15 : x
  2. Step 2: Convert to fraction form
    8,140.75/12,211.60 = 3,143.15/x
  3. Step 3: Cross multiply
    8,140.75x = 12,211.60 × 3,143.15
  4. Step 4: Simplify right side
    8,140.75x = 38,382,813.77
  5. Step 5: Solve for x
    x = 38,382,813.77/8,140.75
  6. Step 6: Final answer
    x = 4,714.90

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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.