Home / 20,100.85-27,739.20-11,149.72

Finding the Fourth Proportional to 20,100.85, 27,739.20 and 11,149.72

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Solution

The fourth proportional to 20,100.85, 27,739.20 and 11,149.72 is: 15,386.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,100.85 : 27,739.20 = 11,149.72 : x
  2. Step 2: Convert to fraction form
    20,100.85/27,739.20 = 11,149.72/x
  3. Step 3: Cross multiply
    20,100.85x = 27,739.20 × 11,149.72
  4. Step 4: Simplify right side
    20,100.85x = 309,284,313.02
  5. Step 5: Solve for x
    x = 309,284,313.02/20,100.85
  6. Step 6: Final answer
    x = 15,386.63

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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.