Home / 12,639.35-18,958.97-3,278.58

Finding the Fourth Proportional to 12,639.35, 18,958.97 and 3,278.58

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Solution

The fourth proportional to 12,639.35, 18,958.97 and 3,278.58 is: 4,917.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,639.35 : 18,958.97 = 3,278.58 : x
  2. Step 2: Convert to fraction form
    12,639.35/18,958.97 = 3,278.58/x
  3. Step 3: Cross multiply
    12,639.35x = 18,958.97 × 3,278.58
  4. Step 4: Simplify right side
    12,639.35x = 62,158,483.47
  5. Step 5: Solve for x
    x = 62,158,483.47/12,639.35
  6. Step 6: Final answer
    x = 4,917.86

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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.