Home / 21,789.54-30,069.14-12,229.65

Finding the Fourth Proportional to 21,789.54, 30,069.14 and 12,229.65

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Solution

The fourth proportional to 21,789.54, 30,069.14 and 12,229.65 is: 16,876.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,789.54 : 30,069.14 = 12,229.65 : x
  2. Step 2: Convert to fraction form
    21,789.54/30,069.14 = 12,229.65/x
  3. Step 3: Cross multiply
    21,789.54x = 30,069.14 × 12,229.65
  4. Step 4: Simplify right side
    21,789.54x = 367,734,996.85
  5. Step 5: Solve for x
    x = 367,734,996.85/21,789.54
  6. Step 6: Final answer
    x = 16,876.68

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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.