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Finding the Fourth Proportional to 19,219.26, 28,820.24 and 8,120.24

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Solution

The fourth proportional to 19,219.26, 28,820.24 and 8,120.24 is: 12,176.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,219.26 : 28,820.24 = 8,120.24 : x
  2. Step 2: Convert to fraction form
    19,219.26/28,820.24 = 8,120.24/x
  3. Step 3: Cross multiply
    19,219.26x = 28,820.24 × 8,120.24
  4. Step 4: Simplify right side
    19,219.26x = 234,027,265.66
  5. Step 5: Solve for x
    x = 234,027,265.66/19,219.26
  6. Step 6: Final answer
    x = 12,176.71

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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.