Home / 12,920.20-19,418.70-11,230.60

Finding the Fourth Proportional to 12,920.20, 19,418.70 and 11,230.60

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Solution

The fourth proportional to 12,920.20, 19,418.70 and 11,230.60 is: 16,879.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,920.20 : 19,418.70 = 11,230.60 : x
  2. Step 2: Convert to fraction form
    12,920.20/19,418.70 = 11,230.60/x
  3. Step 3: Cross multiply
    12,920.20x = 19,418.70 × 11,230.60
  4. Step 4: Simplify right side
    12,920.20x = 218,083,652.22
  5. Step 5: Solve for x
    x = 218,083,652.22/12,920.20
  6. Step 6: Final answer
    x = 16,879.28

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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.