Home / 12,212.70-18,282.60-7,279.80

Finding the Fourth Proportional to 12,212.70, 18,282.60 and 7,279.80

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Solution

The fourth proportional to 12,212.70, 18,282.60 and 7,279.80 is: 10,897.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,212.70 : 18,282.60 = 7,279.80 : x
  2. Step 2: Convert to fraction form
    12,212.70/18,282.60 = 7,279.80/x
  3. Step 3: Cross multiply
    12,212.70x = 18,282.60 × 7,279.80
  4. Step 4: Simplify right side
    12,212.70x = 133,093,671.48
  5. Step 5: Solve for x
    x = 133,093,671.48/12,212.70
  6. Step 6: Final answer
    x = 10,897.97

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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.