Home / 6,643.26-9,168.48-3,990.60

Finding the Fourth Proportional to 6,643.26, 9,168.48 and 3,990.60

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Solution

The fourth proportional to 6,643.26, 9,168.48 and 3,990.60 is: 5,507.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,643.26 : 9,168.48 = 3,990.60 : x
  2. Step 2: Convert to fraction form
    6,643.26/9,168.48 = 3,990.60/x
  3. Step 3: Cross multiply
    6,643.26x = 9,168.48 × 3,990.60
  4. Step 4: Simplify right side
    6,643.26x = 36,587,736.29
  5. Step 5: Solve for x
    x = 36,587,736.29/6,643.26
  6. Step 6: Final answer
    x = 5,507.50

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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.