Home / 13,138.39-19,672.35-8,198.20

Finding the Fourth Proportional to 13,138.39, 19,672.35 and 8,198.20

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Solution

The fourth proportional to 13,138.39, 19,672.35 and 8,198.20 is: 12,275.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,138.39 : 19,672.35 = 8,198.20 : x
  2. Step 2: Convert to fraction form
    13,138.39/19,672.35 = 8,198.20/x
  3. Step 3: Cross multiply
    13,138.39x = 19,672.35 × 8,198.20
  4. Step 4: Simplify right side
    13,138.39x = 161,277,859.77
  5. Step 5: Solve for x
    x = 161,277,859.77/13,138.39
  6. Step 6: Final answer
    x = 12,275.31

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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.