Home / 18,813.80-28,220.94-12,968.84

Finding the Fourth Proportional to 18,813.80, 28,220.94 and 12,968.84

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Solution

The fourth proportional to 18,813.80, 28,220.94 and 12,968.84 is: 19,453.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,813.80 : 28,220.94 = 12,968.84 : x
  2. Step 2: Convert to fraction form
    18,813.80/28,220.94 = 12,968.84/x
  3. Step 3: Cross multiply
    18,813.80x = 28,220.94 × 12,968.84
  4. Step 4: Simplify right side
    18,813.80x = 365,992,855.51
  5. Step 5: Solve for x
    x = 365,992,855.51/18,813.80
  6. Step 6: Final answer
    x = 19,453.43

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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.