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Finding the Fourth Proportional to 12,679.20, 19,020.60 and 4,359.60

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Solution

The fourth proportional to 12,679.20, 19,020.60 and 4,359.60 is: 6,540.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,679.20 : 19,020.60 = 4,359.60 : x
  2. Step 2: Convert to fraction form
    12,679.20/19,020.60 = 4,359.60/x
  3. Step 3: Cross multiply
    12,679.20x = 19,020.60 × 4,359.60
  4. Step 4: Simplify right side
    12,679.20x = 82,922,207.76
  5. Step 5: Solve for x
    x = 82,922,207.76/12,679.20
  6. Step 6: Final answer
    x = 6,540.02

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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.