Home / 8,212.60-12,315.30-3,280.60

Finding the Fourth Proportional to 8,212.60, 12,315.30 and 3,280.60

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Solution

The fourth proportional to 8,212.60, 12,315.30 and 3,280.60 is: 4,919.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,212.60 : 12,315.30 = 3,280.60 : x
  2. Step 2: Convert to fraction form
    8,212.60/12,315.30 = 3,280.60/x
  3. Step 3: Cross multiply
    8,212.60x = 12,315.30 × 3,280.60
  4. Step 4: Simplify right side
    8,212.60x = 40,401,573.18
  5. Step 5: Solve for x
    x = 40,401,573.18/8,212.60
  6. Step 6: Final answer
    x = 4,919.46

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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.