Home / 13,845.63-20,843.25-12,640.35

Finding the Fourth Proportional to 13,845.63, 20,843.25 and 12,640.35

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Solution

The fourth proportional to 13,845.63, 20,843.25 and 12,640.35 is: 19,028.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,845.63 : 20,843.25 = 12,640.35 : x
  2. Step 2: Convert to fraction form
    13,845.63/20,843.25 = 12,640.35/x
  3. Step 3: Cross multiply
    13,845.63x = 20,843.25 × 12,640.35
  4. Step 4: Simplify right side
    13,845.63x = 263,465,975.14
  5. Step 5: Solve for x
    x = 263,465,975.14/13,845.63
  6. Step 6: Final answer
    x = 19,028.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.