Home / 12,620.40-18,930.60-4,309.80

Finding the Fourth Proportional to 12,620.40, 18,930.60 and 4,309.80

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Solution

The fourth proportional to 12,620.40, 18,930.60 and 4,309.80 is: 6,464.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,620.40 : 18,930.60 = 4,309.80 : x
  2. Step 2: Convert to fraction form
    12,620.40/18,930.60 = 4,309.80/x
  3. Step 3: Cross multiply
    12,620.40x = 18,930.60 × 4,309.80
  4. Step 4: Simplify right side
    12,620.40x = 81,587,099.88
  5. Step 5: Solve for x
    x = 81,587,099.88/12,620.40
  6. Step 6: Final answer
    x = 6,464.70

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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.