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Finding the Fourth Proportional to 6,390.96, 8,819.65 and 3,558.39

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Solution

The fourth proportional to 6,390.96, 8,819.65 and 3,558.39 is: 4,910.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,390.96 : 8,819.65 = 3,558.39 : x
  2. Step 2: Convert to fraction form
    6,390.96/8,819.65 = 3,558.39/x
  3. Step 3: Cross multiply
    6,390.96x = 8,819.65 × 3,558.39
  4. Step 4: Simplify right side
    6,390.96x = 31,383,754.36
  5. Step 5: Solve for x
    x = 31,383,754.36/6,390.96
  6. Step 6: Final answer
    x = 4,910.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.