Home / 6,390.56-8,819.48-3,558.40

Finding the Fourth Proportional to 6,390.56, 8,819.48 and 3,558.40

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Solution

The fourth proportional to 6,390.56, 8,819.48 and 3,558.40 is: 4,910.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,390.56 : 8,819.48 = 3,558.40 : x
  2. Step 2: Convert to fraction form
    6,390.56/8,819.48 = 3,558.40/x
  3. Step 3: Cross multiply
    6,390.56x = 8,819.48 × 3,558.40
  4. Step 4: Simplify right side
    6,390.56x = 31,383,224.48
  5. Step 5: Solve for x
    x = 31,383,224.48/6,390.56
  6. Step 6: Final answer
    x = 4,910.87

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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.