Home / 13,722.88-18,920.37-11,202.43

Finding the Fourth Proportional to 13,722.88, 18,920.37 and 11,202.43

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Solution

The fourth proportional to 13,722.88, 18,920.37 and 11,202.43 is: 15,445.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,722.88 : 18,920.37 = 11,202.43 : x
  2. Step 2: Convert to fraction form
    13,722.88/18,920.37 = 11,202.43/x
  3. Step 3: Cross multiply
    13,722.88x = 18,920.37 × 11,202.43
  4. Step 4: Simplify right side
    13,722.88x = 211,954,120.50
  5. Step 5: Solve for x
    x = 211,954,120.50/13,722.88
  6. Step 6: Final answer
    x = 15,445.31

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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.