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Finding the Fourth Proportional to 6,419.66, 8,855.33 and 3,899.75

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Solution

The fourth proportional to 6,419.66, 8,855.33 and 3,899.75 is: 5,379.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,419.66 : 8,855.33 = 3,899.75 : x
  2. Step 2: Convert to fraction form
    6,419.66/8,855.33 = 3,899.75/x
  3. Step 3: Cross multiply
    6,419.66x = 8,855.33 × 3,899.75
  4. Step 4: Simplify right side
    6,419.66x = 34,533,509.39
  5. Step 5: Solve for x
    x = 34,533,509.39/6,419.66
  6. Step 6: Final answer
    x = 5,379.34

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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.