Home / 8,485.85-12,704.97-6,399.29

Finding the Fourth Proportional to 8,485.85, 12,704.97 and 6,399.29

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Solution

The fourth proportional to 8,485.85, 12,704.97 and 6,399.29 is: 9,580.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,485.85 : 12,704.97 = 6,399.29 : x
  2. Step 2: Convert to fraction form
    8,485.85/12,704.97 = 6,399.29/x
  3. Step 3: Cross multiply
    8,485.85x = 12,704.97 × 6,399.29
  4. Step 4: Simplify right side
    8,485.85x = 81,302,723.95
  5. Step 5: Solve for x
    x = 81,302,723.95/8,485.85
  6. Step 6: Final answer
    x = 9,580.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.