Home / 20,621.23-30,911.07-8,150.11

Finding the Fourth Proportional to 20,621.23, 30,911.07 and 8,150.11

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Solution

The fourth proportional to 20,621.23, 30,911.07 and 8,150.11 is: 12,216.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,621.23 : 30,911.07 = 8,150.11 : x
  2. Step 2: Convert to fraction form
    20,621.23/30,911.07 = 8,150.11/x
  3. Step 3: Cross multiply
    20,621.23x = 30,911.07 × 8,150.11
  4. Step 4: Simplify right side
    20,621.23x = 251,928,620.72
  5. Step 5: Solve for x
    x = 251,928,620.72/20,621.23
  6. Step 6: Final answer
    x = 12,216.95

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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.