Home / 12,839.15-19,257.20-3,478.58

Finding the Fourth Proportional to 12,839.15, 19,257.20 and 3,478.58

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Solution

The fourth proportional to 12,839.15, 19,257.20 and 3,478.58 is: 5,217.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,839.15 : 19,257.20 = 3,478.58 : x
  2. Step 2: Convert to fraction form
    12,839.15/19,257.20 = 3,478.58/x
  3. Step 3: Cross multiply
    12,839.15x = 19,257.20 × 3,478.58
  4. Step 4: Simplify right side
    12,839.15x = 66,987,790.68
  5. Step 5: Solve for x
    x = 66,987,790.68/12,839.15
  6. Step 6: Final answer
    x = 5,217.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.