Home / 12,285.38-18,428.07-3,519.56

Finding the Fourth Proportional to 12,285.38, 18,428.07 and 3,519.56

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Solution

The fourth proportional to 12,285.38, 18,428.07 and 3,519.56 is: 5,279.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,285.38 : 18,428.07 = 3,519.56 : x
  2. Step 2: Convert to fraction form
    12,285.38/18,428.07 = 3,519.56/x
  3. Step 3: Cross multiply
    12,285.38x = 18,428.07 × 3,519.56
  4. Step 4: Simplify right side
    12,285.38x = 64,858,698.05
  5. Step 5: Solve for x
    x = 64,858,698.05/12,285.38
  6. Step 6: Final answer
    x = 5,279.34

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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.