Home / 12,908.20-19,358.94-4,138.60

Finding the Fourth Proportional to 12,908.20, 19,358.94 and 4,138.60

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Solution

The fourth proportional to 12,908.20, 19,358.94 and 4,138.60 is: 6,206.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,908.20 : 19,358.94 = 4,138.60 : x
  2. Step 2: Convert to fraction form
    12,908.20/19,358.94 = 4,138.60/x
  3. Step 3: Cross multiply
    12,908.20x = 19,358.94 × 4,138.60
  4. Step 4: Simplify right side
    12,908.20x = 80,118,909.08
  5. Step 5: Solve for x
    x = 80,118,909.08/12,908.20
  6. Step 6: Final answer
    x = 6,206.82

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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.