Home / 8,276.88-12,399.63-6,418.90

Finding the Fourth Proportional to 8,276.88, 12,399.63 and 6,418.90

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Solution

The fourth proportional to 8,276.88, 12,399.63 and 6,418.90 is: 9,616.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,276.88 : 12,399.63 = 6,418.90 : x
  2. Step 2: Convert to fraction form
    8,276.88/12,399.63 = 6,418.90/x
  3. Step 3: Cross multiply
    8,276.88x = 12,399.63 × 6,418.90
  4. Step 4: Simplify right side
    8,276.88x = 79,591,942.79
  5. Step 5: Solve for x
    x = 79,591,942.79/8,276.88
  6. Step 6: Final answer
    x = 9,616.17

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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.