Home / 20,079.75-27,710.78-12,120.42

Finding the Fourth Proportional to 20,079.75, 27,710.78 and 12,120.42

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Solution

The fourth proportional to 20,079.75, 27,710.78 and 12,120.42 is: 16,726.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,079.75 : 27,710.78 = 12,120.42 : x
  2. Step 2: Convert to fraction form
    20,079.75/27,710.78 = 12,120.42/x
  3. Step 3: Cross multiply
    20,079.75x = 27,710.78 × 12,120.42
  4. Step 4: Simplify right side
    20,079.75x = 335,866,335.44
  5. Step 5: Solve for x
    x = 335,866,335.44/20,079.75
  6. Step 6: Final answer
    x = 16,726.62

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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.