Home / 20,078.12-27,704.58-12,620.84

Finding the Fourth Proportional to 20,078.12, 27,704.58 and 12,620.84

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Solution

The fourth proportional to 20,078.12, 27,704.58 and 12,620.84 is: 17,414.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,078.12 : 27,704.58 = 12,620.84 : x
  2. Step 2: Convert to fraction form
    20,078.12/27,704.58 = 12,620.84/x
  3. Step 3: Cross multiply
    20,078.12x = 27,704.58 × 12,620.84
  4. Step 4: Simplify right side
    20,078.12x = 349,655,071.45
  5. Step 5: Solve for x
    x = 349,655,071.45/20,078.12
  6. Step 6: Final answer
    x = 17,414.73

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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.