Home / 12,639.09-18,959.12-3,278.87

Finding the Fourth Proportional to 12,639.09, 18,959.12 and 3,278.87

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Solution

The fourth proportional to 12,639.09, 18,959.12 and 3,278.87 is: 4,918.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,639.09 : 18,959.12 = 3,278.87 : x
  2. Step 2: Convert to fraction form
    12,639.09/18,959.12 = 3,278.87/x
  3. Step 3: Cross multiply
    12,639.09x = 18,959.12 × 3,278.87
  4. Step 4: Simplify right side
    12,639.09x = 62,164,378.60
  5. Step 5: Solve for x
    x = 62,164,378.60/12,639.09
  6. Step 6: Final answer
    x = 4,918.42

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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.