Home / 20,142.48-27,785.25-12,181.80

Finding the Fourth Proportional to 20,142.48, 27,785.25 and 12,181.80

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Solution

The fourth proportional to 20,142.48, 27,785.25 and 12,181.80 is: 16,804.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,142.48 : 27,785.25 = 12,181.80 : x
  2. Step 2: Convert to fraction form
    20,142.48/27,785.25 = 12,181.80/x
  3. Step 3: Cross multiply
    20,142.48x = 27,785.25 × 12,181.80
  4. Step 4: Simplify right side
    20,142.48x = 338,474,358.45
  5. Step 5: Solve for x
    x = 338,474,358.45/20,142.48
  6. Step 6: Final answer
    x = 16,804.01

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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.