Home / 6,319.35-8,720.87-3,486.78

Finding the Fourth Proportional to 6,319.35, 8,720.87 and 3,486.78

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Solution

The fourth proportional to 6,319.35, 8,720.87 and 3,486.78 is: 4,811.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,319.35 : 8,720.87 = 3,486.78 : x
  2. Step 2: Convert to fraction form
    6,319.35/8,720.87 = 3,486.78/x
  3. Step 3: Cross multiply
    6,319.35x = 8,720.87 × 3,486.78
  4. Step 4: Simplify right side
    6,319.35x = 30,407,737.66
  5. Step 5: Solve for x
    x = 30,407,737.66/6,319.35
  6. Step 6: Final answer
    x = 4,811.85

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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.