Home / 3,909.36-5,385.84-2,728.56

Finding the Fourth Proportional to 3,909.36, 5,385.84 and 2,728.56

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Solution

The fourth proportional to 3,909.36, 5,385.84 and 2,728.56 is: 3,759.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,909.36 : 5,385.84 = 2,728.56 : x
  2. Step 2: Convert to fraction form
    3,909.36/5,385.84 = 2,728.56/x
  3. Step 3: Cross multiply
    3,909.36x = 5,385.84 × 2,728.56
  4. Step 4: Simplify right side
    3,909.36x = 14,695,587.59
  5. Step 5: Solve for x
    x = 14,695,587.59/3,909.36
  6. Step 6: Final answer
    x = 3,759.08

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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.