Home / 18,278.45-25,218.94-11,478.09

Finding the Fourth Proportional to 18,278.45, 25,218.94 and 11,478.09

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Solution

The fourth proportional to 18,278.45, 25,218.94 and 11,478.09 is: 15,836.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,278.45 : 25,218.94 = 11,478.09 : x
  2. Step 2: Convert to fraction form
    18,278.45/25,218.94 = 11,478.09/x
  3. Step 3: Cross multiply
    18,278.45x = 25,218.94 × 11,478.09
  4. Step 4: Simplify right side
    18,278.45x = 289,465,234.33
  5. Step 5: Solve for x
    x = 289,465,234.33/18,278.45
  6. Step 6: Final answer
    x = 15,836.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.