Home / 12,481.08-18,640.70-11,308.74

Finding the Fourth Proportional to 12,481.08, 18,640.70 and 11,308.74

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Solution

The fourth proportional to 12,481.08, 18,640.70 and 11,308.74 is: 16,889.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,481.08 : 18,640.70 = 11,308.74 : x
  2. Step 2: Convert to fraction form
    12,481.08/18,640.70 = 11,308.74/x
  3. Step 3: Cross multiply
    12,481.08x = 18,640.70 × 11,308.74
  4. Step 4: Simplify right side
    12,481.08x = 210,802,829.72
  5. Step 5: Solve for x
    x = 210,802,829.72/12,481.08
  6. Step 6: Final answer
    x = 16,889.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.