Home / 6,419.03-8,855.79-3,900.20

Finding the Fourth Proportional to 6,419.03, 8,855.79 and 3,900.20

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Solution

The fourth proportional to 6,419.03, 8,855.79 and 3,900.20 is: 5,380.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,419.03 : 8,855.79 = 3,900.20 : x
  2. Step 2: Convert to fraction form
    6,419.03/8,855.79 = 3,900.20/x
  3. Step 3: Cross multiply
    6,419.03x = 8,855.79 × 3,900.20
  4. Step 4: Simplify right side
    6,419.03x = 34,539,307.88
  5. Step 5: Solve for x
    x = 34,539,307.88/6,419.03
  6. Step 6: Final answer
    x = 5,380.77

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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.