Home / 6,416.80-8,850.10-3,898.85

Finding the Fourth Proportional to 6,416.80, 8,850.10 and 3,898.85

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Solution

The fourth proportional to 6,416.80, 8,850.10 and 3,898.85 is: 5,377.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,416.80 : 8,850.10 = 3,898.85 : x
  2. Step 2: Convert to fraction form
    6,416.80/8,850.10 = 3,898.85/x
  3. Step 3: Cross multiply
    6,416.80x = 8,850.10 × 3,898.85
  4. Step 4: Simplify right side
    6,416.80x = 34,505,190.26
  5. Step 5: Solve for x
    x = 34,505,190.26/6,416.80
  6. Step 6: Final answer
    x = 5,377.32

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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.