Home / 20,550.87-28,360.20-11,119.43

Finding the Fourth Proportional to 20,550.87, 28,360.20 and 11,119.43

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Solution

The fourth proportional to 20,550.87, 28,360.20 and 11,119.43 is: 15,344.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,550.87 : 28,360.20 = 11,119.43 : x
  2. Step 2: Convert to fraction form
    20,550.87/28,360.20 = 11,119.43/x
  3. Step 3: Cross multiply
    20,550.87x = 28,360.20 × 11,119.43
  4. Step 4: Simplify right side
    20,550.87x = 315,349,203.09
  5. Step 5: Solve for x
    x = 315,349,203.09/20,550.87
  6. Step 6: Final answer
    x = 15,344.81

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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.