Home / 12,128.39-18,180.26-9,200.55

Finding the Fourth Proportional to 12,128.39, 18,180.26 and 9,200.55

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Solution

The fourth proportional to 12,128.39, 18,180.26 and 9,200.55 is: 13,791.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128.39 : 18,180.26 = 9,200.55 : x
  2. Step 2: Convert to fraction form
    12,128.39/18,180.26 = 9,200.55/x
  3. Step 3: Cross multiply
    12,128.39x = 18,180.26 × 9,200.55
  4. Step 4: Simplify right side
    12,128.39x = 167,268,391.14
  5. Step 5: Solve for x
    x = 167,268,391.14/12,128.39
  6. Step 6: Final answer
    x = 13,791.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.