Home / 20,493.20-30,768.60-12,717.20

Finding the Fourth Proportional to 20,493.20, 30,768.60 and 12,717.20

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Solution

The fourth proportional to 20,493.20, 30,768.60 and 12,717.20 is: 19,093.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,493.20 : 30,768.60 = 12,717.20 : x
  2. Step 2: Convert to fraction form
    20,493.20/30,768.60 = 12,717.20/x
  3. Step 3: Cross multiply
    20,493.20x = 30,768.60 × 12,717.20
  4. Step 4: Simplify right side
    20,493.20x = 391,290,439.92
  5. Step 5: Solve for x
    x = 391,290,439.92/20,493.20
  6. Step 6: Final answer
    x = 19,093.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.