Home / 12,785.21-19,179.60-4,020.80

Finding the Fourth Proportional to 12,785.21, 19,179.60 and 4,020.80

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Solution

The fourth proportional to 12,785.21, 19,179.60 and 4,020.80 is: 6,031.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,785.21 : 19,179.60 = 4,020.80 : x
  2. Step 2: Convert to fraction form
    12,785.21/19,179.60 = 4,020.80/x
  3. Step 3: Cross multiply
    12,785.21x = 19,179.60 × 4,020.80
  4. Step 4: Simplify right side
    12,785.21x = 77,117,335.68
  5. Step 5: Solve for x
    x = 77,117,335.68/12,785.21
  6. Step 6: Final answer
    x = 6,031.76

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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.