Home / 12,112.88-16,721.46-8,136.80

Finding the Fourth Proportional to 12,112.88, 16,721.46 and 8,136.80

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Solution

The fourth proportional to 12,112.88, 16,721.46 and 8,136.80 is: 11,232.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,112.88 : 16,721.46 = 8,136.80 : x
  2. Step 2: Convert to fraction form
    12,112.88/16,721.46 = 8,136.80/x
  3. Step 3: Cross multiply
    12,112.88x = 16,721.46 × 8,136.80
  4. Step 4: Simplify right side
    12,112.88x = 136,059,175.73
  5. Step 5: Solve for x
    x = 136,059,175.73/12,112.88
  6. Step 6: Final answer
    x = 11,232.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.