Home / 4,212.60-6,318.90-3,121.80

Finding the Fourth Proportional to 4,212.60, 6,318.90 and 3,121.80

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Solution

The fourth proportional to 4,212.60, 6,318.90 and 3,121.80 is: 4,682.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,212.60 : 6,318.90 = 3,121.80 : x
  2. Step 2: Convert to fraction form
    4,212.60/6,318.90 = 3,121.80/x
  3. Step 3: Cross multiply
    4,212.60x = 6,318.90 × 3,121.80
  4. Step 4: Simplify right side
    4,212.60x = 19,726,342.02
  5. Step 5: Solve for x
    x = 19,726,342.02/4,212.60
  6. Step 6: Final answer
    x = 4,682.70

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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.