Home / 22,221.39-30,668.22-12,789.75

Finding the Fourth Proportional to 22,221.39, 30,668.22 and 12,789.75

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Solution

The fourth proportional to 22,221.39, 30,668.22 and 12,789.75 is: 17,651.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,221.39 : 30,668.22 = 12,789.75 : x
  2. Step 2: Convert to fraction form
    22,221.39/30,668.22 = 12,789.75/x
  3. Step 3: Cross multiply
    22,221.39x = 30,668.22 × 12,789.75
  4. Step 4: Simplify right side
    22,221.39x = 392,238,866.75
  5. Step 5: Solve for x
    x = 392,238,866.75/22,221.39
  6. Step 6: Final answer
    x = 17,651.41

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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.