Home / 6,418.20-8,857.74-3,899.76

Finding the Fourth Proportional to 6,418.20, 8,857.74 and 3,899.76

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Solution

The fourth proportional to 6,418.20, 8,857.74 and 3,899.76 is: 5,382.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,418.20 : 8,857.74 = 3,899.76 : x
  2. Step 2: Convert to fraction form
    6,418.20/8,857.74 = 3,899.76/x
  3. Step 3: Cross multiply
    6,418.20x = 8,857.74 × 3,899.76
  4. Step 4: Simplify right side
    6,418.20x = 34,543,060.14
  5. Step 5: Solve for x
    x = 34,543,060.14/6,418.20
  6. Step 6: Final answer
    x = 5,382.05

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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.