Home / 12,639.58-18,958.66-3,874.47

Finding the Fourth Proportional to 12,639.58, 18,958.66 and 3,874.47

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Solution

The fourth proportional to 12,639.58, 18,958.66 and 3,874.47 is: 5,811.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,639.58 : 18,958.66 = 3,874.47 : x
  2. Step 2: Convert to fraction form
    12,639.58/18,958.66 = 3,874.47/x
  3. Step 3: Cross multiply
    12,639.58x = 18,958.66 × 3,874.47
  4. Step 4: Simplify right side
    12,639.58x = 73,454,678.63
  5. Step 5: Solve for x
    x = 73,454,678.63/12,639.58
  6. Step 6: Final answer
    x = 5,811.48

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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.