Home / 19,921.88-27,480.72-12,456.92

Finding the Fourth Proportional to 19,921.88, 27,480.72 and 12,456.92

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Solution

The fourth proportional to 19,921.88, 27,480.72 and 12,456.92 is: 17,183.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,921.88 : 27,480.72 = 12,456.92 : x
  2. Step 2: Convert to fraction form
    19,921.88/27,480.72 = 12,456.92/x
  3. Step 3: Cross multiply
    19,921.88x = 27,480.72 × 12,456.92
  4. Step 4: Simplify right side
    19,921.88x = 342,325,130.58
  5. Step 5: Solve for x
    x = 342,325,130.58/19,921.88
  6. Step 6: Final answer
    x = 17,183.37

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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.