Home / 7,180.75-9,909.25-3,994.05

Finding the Fourth Proportional to 7,180.75, 9,909.25 and 3,994.05

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Solution

The fourth proportional to 7,180.75, 9,909.25 and 3,994.05 is: 5,511.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,180.75 : 9,909.25 = 3,994.05 : x
  2. Step 2: Convert to fraction form
    7,180.75/9,909.25 = 3,994.05/x
  3. Step 3: Cross multiply
    7,180.75x = 9,909.25 × 3,994.05
  4. Step 4: Simplify right side
    7,180.75x = 39,578,039.96
  5. Step 5: Solve for x
    x = 39,578,039.96/7,180.75
  6. Step 6: Final answer
    x = 5,511.69

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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.