Home / 12,220.88-18,331.31-2,986.88

Finding the Fourth Proportional to 12,220.88, 18,331.31 and 2,986.88

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Solution

The fourth proportional to 12,220.88, 18,331.31 and 2,986.88 is: 4,480.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,220.88 : 18,331.31 = 2,986.88 : x
  2. Step 2: Convert to fraction form
    12,220.88/18,331.31 = 2,986.88/x
  3. Step 3: Cross multiply
    12,220.88x = 18,331.31 × 2,986.88
  4. Step 4: Simplify right side
    12,220.88x = 54,753,339.02
  5. Step 5: Solve for x
    x = 54,753,339.02/12,220.88
  6. Step 6: Final answer
    x = 4,480.31

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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.