Home / 12,540.74-18,809.57-7,278.61

Finding the Fourth Proportional to 12,540.74, 18,809.57 and 7,278.61

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Solution

The fourth proportional to 12,540.74, 18,809.57 and 7,278.61 is: 10,917.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,540.74 : 18,809.57 = 7,278.61 : x
  2. Step 2: Convert to fraction form
    12,540.74/18,809.57 = 7,278.61/x
  3. Step 3: Cross multiply
    12,540.74x = 18,809.57 × 7,278.61
  4. Step 4: Simplify right side
    12,540.74x = 136,907,489.80
  5. Step 5: Solve for x
    x = 136,907,489.80/12,540.74
  6. Step 6: Final answer
    x = 10,917.02

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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.