Home / 12,221.91-18,319.03-8,425.25

Finding the Fourth Proportional to 12,221.91, 18,319.03 and 8,425.25

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Solution

The fourth proportional to 12,221.91, 18,319.03 and 8,425.25 is: 12,628.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,221.91 : 18,319.03 = 8,425.25 : x
  2. Step 2: Convert to fraction form
    12,221.91/18,319.03 = 8,425.25/x
  3. Step 3: Cross multiply
    12,221.91x = 18,319.03 × 8,425.25
  4. Step 4: Simplify right side
    12,221.91x = 154,342,342.68
  5. Step 5: Solve for x
    x = 154,342,342.68/12,221.91
  6. Step 6: Final answer
    x = 12,628.33

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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.