Home / 12,639.75-18,959.63-3,874.61

Finding the Fourth Proportional to 12,639.75, 18,959.63 and 3,874.61

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Solution

The fourth proportional to 12,639.75, 18,959.63 and 3,874.61 is: 5,811.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,639.75 : 18,959.63 = 3,874.61 : x
  2. Step 2: Convert to fraction form
    12,639.75/18,959.63 = 3,874.61/x
  3. Step 3: Cross multiply
    12,639.75x = 18,959.63 × 3,874.61
  4. Step 4: Simplify right side
    12,639.75x = 73,461,057.82
  5. Step 5: Solve for x
    x = 73,461,057.82/12,639.75
  6. Step 6: Final answer
    x = 5,811.91

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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.