Home / 12,618.80-18,930.20-4,299.60

Finding the Fourth Proportional to 12,618.80, 18,930.20 and 4,299.60

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Solution

The fourth proportional to 12,618.80, 18,930.20 and 4,299.60 is: 6,450.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,618.80 : 18,930.20 = 4,299.60 : x
  2. Step 2: Convert to fraction form
    12,618.80/18,930.20 = 4,299.60/x
  3. Step 3: Cross multiply
    12,618.80x = 18,930.20 × 4,299.60
  4. Step 4: Simplify right side
    12,618.80x = 81,392,287.92
  5. Step 5: Solve for x
    x = 81,392,287.92/12,618.80
  6. Step 6: Final answer
    x = 6,450.08

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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.