Home / 20,142.15-27,783.85-11,960.21

Finding the Fourth Proportional to 20,142.15, 27,783.85 and 11,960.21

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Solution

The fourth proportional to 20,142.15, 27,783.85 and 11,960.21 is: 16,497.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,142.15 : 27,783.85 = 11,960.21 : x
  2. Step 2: Convert to fraction form
    20,142.15/27,783.85 = 11,960.21/x
  3. Step 3: Cross multiply
    20,142.15x = 27,783.85 × 11,960.21
  4. Step 4: Simplify right side
    20,142.15x = 332,300,714.91
  5. Step 5: Solve for x
    x = 332,300,714.91/20,142.15
  6. Step 6: Final answer
    x = 16,497.78

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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.