Home / 8,139.21-12,200.49-4,621.79

Finding the Fourth Proportional to 8,139.21, 12,200.49 and 4,621.79

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Solution

The fourth proportional to 8,139.21, 12,200.49 and 4,621.79 is: 6,927.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,139.21 : 12,200.49 = 4,621.79 : x
  2. Step 2: Convert to fraction form
    8,139.21/12,200.49 = 4,621.79/x
  3. Step 3: Cross multiply
    8,139.21x = 12,200.49 × 4,621.79
  4. Step 4: Simplify right side
    8,139.21x = 56,388,041.67
  5. Step 5: Solve for x
    x = 56,388,041.67/8,139.21
  6. Step 6: Final answer
    x = 6,927.95

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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.