Home / 20,550.86-28,360.22-11,119.42

Finding the Fourth Proportional to 20,550.86, 28,360.22 and 11,119.42

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Solution

The fourth proportional to 20,550.86, 28,360.22 and 11,119.42 is: 15,344.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,550.86 : 28,360.22 = 11,119.42 : x
  2. Step 2: Convert to fraction form
    20,550.86/28,360.22 = 11,119.42/x
  3. Step 3: Cross multiply
    20,550.86x = 28,360.22 × 11,119.42
  4. Step 4: Simplify right side
    20,550.86x = 315,349,070.97
  5. Step 5: Solve for x
    x = 315,349,070.97/20,550.86
  6. Step 6: Final answer
    x = 15,344.82

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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.