Home / 12,986.29-19,481.32-4,098.60

Finding the Fourth Proportional to 12,986.29, 19,481.32 and 4,098.60

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Solution

The fourth proportional to 12,986.29, 19,481.32 and 4,098.60 is: 6,148.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,986.29 : 19,481.32 = 4,098.60 : x
  2. Step 2: Convert to fraction form
    12,986.29/19,481.32 = 4,098.60/x
  3. Step 3: Cross multiply
    12,986.29x = 19,481.32 × 4,098.60
  4. Step 4: Simplify right side
    12,986.29x = 79,846,138.15
  5. Step 5: Solve for x
    x = 79,846,138.15/12,986.29
  6. Step 6: Final answer
    x = 6,148.49

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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.