Home / 12,639.38-18,959.00-3,279.39

Finding the Fourth Proportional to 12,639.38, 18,959.00 and 3,279.39

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Solution

The fourth proportional to 12,639.38, 18,959.00 and 3,279.39 is: 4,919.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,639.38 : 18,959.00 = 3,279.39 : x
  2. Step 2: Convert to fraction form
    12,639.38/18,959.00 = 3,279.39/x
  3. Step 3: Cross multiply
    12,639.38x = 18,959.00 × 3,279.39
  4. Step 4: Simplify right side
    12,639.38x = 62,173,867.52
  5. Step 5: Solve for x
    x = 62,173,867.52/12,639.38
  6. Step 6: Final answer
    x = 4,919.06

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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.