Home / 18,440.20-27,621.40-12,520.72

Finding the Fourth Proportional to 18,440.20, 27,621.40 and 12,520.72

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Solution

The fourth proportional to 18,440.20, 27,621.40 and 12,520.72 is: 18,754.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,440.20 : 27,621.40 = 12,520.72 : x
  2. Step 2: Convert to fraction form
    18,440.20/27,621.40 = 12,520.72/x
  3. Step 3: Cross multiply
    18,440.20x = 27,621.40 × 12,520.72
  4. Step 4: Simplify right side
    18,440.20x = 345,839,815.41
  5. Step 5: Solve for x
    x = 345,839,815.41/18,440.20
  6. Step 6: Final answer
    x = 18,754.67

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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.