Home / 12,145.71-18,221.13-3,828.09

Finding the Fourth Proportional to 12,145.71, 18,221.13 and 3,828.09

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Solution

The fourth proportional to 12,145.71, 18,221.13 and 3,828.09 is: 5,742.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,145.71 : 18,221.13 = 3,828.09 : x
  2. Step 2: Convert to fraction form
    12,145.71/18,221.13 = 3,828.09/x
  3. Step 3: Cross multiply
    12,145.71x = 18,221.13 × 3,828.09
  4. Step 4: Simplify right side
    12,145.71x = 69,752,125.54
  5. Step 5: Solve for x
    x = 69,752,125.54/12,145.71
  6. Step 6: Final answer
    x = 5,742.94

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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.