Home / 12,619.20-18,920.70-5,226.60

Finding the Fourth Proportional to 12,619.20, 18,920.70 and 5,226.60

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Solution

The fourth proportional to 12,619.20, 18,920.70 and 5,226.60 is: 7,836.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,619.20 : 18,920.70 = 5,226.60 : x
  2. Step 2: Convert to fraction form
    12,619.20/18,920.70 = 5,226.60/x
  3. Step 3: Cross multiply
    12,619.20x = 18,920.70 × 5,226.60
  4. Step 4: Simplify right side
    12,619.20x = 98,890,930.62
  5. Step 5: Solve for x
    x = 98,890,930.62/12,619.20
  6. Step 6: Final answer
    x = 7,836.55

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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.