Home / 5,376.82-7,419.99-3,138.79

Finding the Fourth Proportional to 5,376.82, 7,419.99 and 3,138.79

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Solution

The fourth proportional to 5,376.82, 7,419.99 and 3,138.79 is: 4,331.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,376.82 : 7,419.99 = 3,138.79 : x
  2. Step 2: Convert to fraction form
    5,376.82/7,419.99 = 3,138.79/x
  3. Step 3: Cross multiply
    5,376.82x = 7,419.99 × 3,138.79
  4. Step 4: Simplify right side
    5,376.82x = 23,289,790.41
  5. Step 5: Solve for x
    x = 23,289,790.41/5,376.82
  6. Step 6: Final answer
    x = 4,331.52

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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.