Home / 12,278.74-18,420.68-3,959.61

Finding the Fourth Proportional to 12,278.74, 18,420.68 and 3,959.61

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Solution

The fourth proportional to 12,278.74, 18,420.68 and 3,959.61 is: 5,940.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,278.74 : 18,420.68 = 3,959.61 : x
  2. Step 2: Convert to fraction form
    12,278.74/18,420.68 = 3,959.61/x
  3. Step 3: Cross multiply
    12,278.74x = 18,420.68 × 3,959.61
  4. Step 4: Simplify right side
    12,278.74x = 72,938,708.73
  5. Step 5: Solve for x
    x = 72,938,708.73/12,278.74
  6. Step 6: Final answer
    x = 5,940.24

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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.