Home / 20,028.08-27,629.55-12,956.78

Finding the Fourth Proportional to 20,028.08, 27,629.55 and 12,956.78

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Solution

The fourth proportional to 20,028.08, 27,629.55 and 12,956.78 is: 17,874.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,028.08 : 27,629.55 = 12,956.78 : x
  2. Step 2: Convert to fraction form
    20,028.08/27,629.55 = 12,956.78/x
  3. Step 3: Cross multiply
    20,028.08x = 27,629.55 × 12,956.78
  4. Step 4: Simplify right side
    20,028.08x = 357,990,000.85
  5. Step 5: Solve for x
    x = 357,990,000.85/20,028.08
  6. Step 6: Final answer
    x = 17,874.40

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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.