Home / 19,078.20-28,617.30-12,079.80

Finding the Fourth Proportional to 19,078.20, 28,617.30 and 12,079.80

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Solution

The fourth proportional to 19,078.20, 28,617.30 and 12,079.80 is: 18,119.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,078.20 : 28,617.30 = 12,079.80 : x
  2. Step 2: Convert to fraction form
    19,078.20/28,617.30 = 12,079.80/x
  3. Step 3: Cross multiply
    19,078.20x = 28,617.30 × 12,079.80
  4. Step 4: Simplify right side
    19,078.20x = 345,691,260.54
  5. Step 5: Solve for x
    x = 345,691,260.54/19,078.20
  6. Step 6: Final answer
    x = 18,119.70

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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.