Home / 20,400.37-28,131.84-19,209.83

Finding the Fourth Proportional to 20,400.37, 28,131.84 and 19,209.83

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Solution

The fourth proportional to 20,400.37, 28,131.84 and 19,209.83 is: 26,490.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.37 : 28,131.84 = 19,209.83 : x
  2. Step 2: Convert to fraction form
    20,400.37/28,131.84 = 19,209.83/x
  3. Step 3: Cross multiply
    20,400.37x = 28,131.84 × 19,209.83
  4. Step 4: Simplify right side
    20,400.37x = 540,407,723.33
  5. Step 5: Solve for x
    x = 540,407,723.33/20,400.37
  6. Step 6: Final answer
    x = 26,490.10

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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.