Home / 22,290.20-30,760.56-12,858.80

Finding the Fourth Proportional to 22,290.20, 30,760.56 and 12,858.80

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Solution

The fourth proportional to 22,290.20, 30,760.56 and 12,858.80 is: 17,745.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,290.20 : 30,760.56 = 12,858.80 : x
  2. Step 2: Convert to fraction form
    22,290.20/30,760.56 = 12,858.80/x
  3. Step 3: Cross multiply
    22,290.20x = 30,760.56 × 12,858.80
  4. Step 4: Simplify right side
    22,290.20x = 395,543,888.93
  5. Step 5: Solve for x
    x = 395,543,888.93/22,290.20
  6. Step 6: Final answer
    x = 17,745.19

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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.