Home / 20,240.80-30,345.40-12,843.88

Finding the Fourth Proportional to 20,240.80, 30,345.40 and 12,843.88

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Solution

The fourth proportional to 20,240.80, 30,345.40 and 12,843.88 is: 19,255.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,240.80 : 30,345.40 = 12,843.88 : x
  2. Step 2: Convert to fraction form
    20,240.80/30,345.40 = 12,843.88/x
  3. Step 3: Cross multiply
    20,240.80x = 30,345.40 × 12,843.88
  4. Step 4: Simplify right side
    20,240.80x = 389,752,676.15
  5. Step 5: Solve for x
    x = 389,752,676.15/20,240.80
  6. Step 6: Final answer
    x = 19,255.79

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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.