Home / 6,418.90-8,858.09-3,900.34

Finding the Fourth Proportional to 6,418.90, 8,858.09 and 3,900.34

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Solution

The fourth proportional to 6,418.90, 8,858.09 and 3,900.34 is: 5,382.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,418.90 : 8,858.09 = 3,900.34 : x
  2. Step 2: Convert to fraction form
    6,418.90/8,858.09 = 3,900.34/x
  3. Step 3: Cross multiply
    6,418.90x = 8,858.09 × 3,900.34
  4. Step 4: Simplify right side
    6,418.90x = 34,549,583.57
  5. Step 5: Solve for x
    x = 34,549,583.57/6,418.90
  6. Step 6: Final answer
    x = 5,382.48

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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.