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Finding the Fourth Proportional to 18,671.58, 28,007.37 and 4,819.50

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Solution

The fourth proportional to 18,671.58, 28,007.37 and 4,819.50 is: 7,229.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,671.58 : 28,007.37 = 4,819.50 : x
  2. Step 2: Convert to fraction form
    18,671.58/28,007.37 = 4,819.50/x
  3. Step 3: Cross multiply
    18,671.58x = 28,007.37 × 4,819.50
  4. Step 4: Simplify right side
    18,671.58x = 134,981,519.72
  5. Step 5: Solve for x
    x = 134,981,519.72/18,671.58
  6. Step 6: Final answer
    x = 7,229.25

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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.