Home / 18,742.41-28,121.38-8,206.99

Finding the Fourth Proportional to 18,742.41, 28,121.38 and 8,206.99

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Solution

The fourth proportional to 18,742.41, 28,121.38 and 8,206.99 is: 12,313.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,742.41 : 28,121.38 = 8,206.99 : x
  2. Step 2: Convert to fraction form
    18,742.41/28,121.38 = 8,206.99/x
  3. Step 3: Cross multiply
    18,742.41x = 28,121.38 × 8,206.99
  4. Step 4: Simplify right side
    18,742.41x = 230,791,793.63
  5. Step 5: Solve for x
    x = 230,791,793.63/18,742.41
  6. Step 6: Final answer
    x = 12,313.88

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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.