Home / 12,940.13-17,889.23-12,821.73

Finding the Fourth Proportional to 12,940.13, 17,889.23 and 12,821.73

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Solution

The fourth proportional to 12,940.13, 17,889.23 and 12,821.73 is: 17,725.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,940.13 : 17,889.23 = 12,821.73 : x
  2. Step 2: Convert to fraction form
    12,940.13/17,889.23 = 12,821.73/x
  3. Step 3: Cross multiply
    12,940.13x = 17,889.23 × 12,821.73
  4. Step 4: Simplify right side
    12,940.13x = 229,370,723.41
  5. Step 5: Solve for x
    x = 229,370,723.41/12,940.13
  6. Step 6: Final answer
    x = 17,725.53

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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.