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Finding the Fourth Proportional to 14,512.80, 21,736.80 and 11,920.80

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Solution

The fourth proportional to 14,512.80, 21,736.80 and 11,920.80 is: 17,854.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,512.80 : 21,736.80 = 11,920.80 : x
  2. Step 2: Convert to fraction form
    14,512.80/21,736.80 = 11,920.80/x
  3. Step 3: Cross multiply
    14,512.80x = 21,736.80 × 11,920.80
  4. Step 4: Simplify right side
    14,512.80x = 259,120,045.44
  5. Step 5: Solve for x
    x = 259,120,045.44/14,512.80
  6. Step 6: Final answer
    x = 17,854.59

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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.