Home / 20,120.55-27,759.93-11,621.55

Finding the Fourth Proportional to 20,120.55, 27,759.93 and 11,621.55

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Solution

The fourth proportional to 20,120.55, 27,759.93 and 11,621.55 is: 16,034.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.55 : 27,759.93 = 11,621.55 : x
  2. Step 2: Convert to fraction form
    20,120.55/27,759.93 = 11,621.55/x
  3. Step 3: Cross multiply
    20,120.55x = 27,759.93 × 11,621.55
  4. Step 4: Simplify right side
    20,120.55x = 322,613,414.49
  5. Step 5: Solve for x
    x = 322,613,414.49/20,120.55
  6. Step 6: Final answer
    x = 16,034.03

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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.