Home / 20,100.72-27,739.07-11,149.05

Finding the Fourth Proportional to 20,100.72, 27,739.07 and 11,149.05

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Solution

The fourth proportional to 20,100.72, 27,739.07 and 11,149.05 is: 15,385.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,100.72 : 27,739.07 = 11,149.05 : x
  2. Step 2: Convert to fraction form
    20,100.72/27,739.07 = 11,149.05/x
  3. Step 3: Cross multiply
    20,100.72x = 27,739.07 × 11,149.05
  4. Step 4: Simplify right side
    20,100.72x = 309,264,222.64
  5. Step 5: Solve for x
    x = 309,264,222.64/20,100.72
  6. Step 6: Final answer
    x = 15,385.73

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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.