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Finding the Fourth Proportional to 12,274.88, 18,418.93 and 4,879.41

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Solution

The fourth proportional to 12,274.88, 18,418.93 and 4,879.41 is: 7,321.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,274.88 : 18,418.93 = 4,879.41 : x
  2. Step 2: Convert to fraction form
    12,274.88/18,418.93 = 4,879.41/x
  3. Step 3: Cross multiply
    12,274.88x = 18,418.93 × 4,879.41
  4. Step 4: Simplify right side
    12,274.88x = 89,873,533.57
  5. Step 5: Solve for x
    x = 89,873,533.57/12,274.88
  6. Step 6: Final answer
    x = 7,321.74

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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.