Home / 18,213.63-27,255.42-13,221.78

Finding the Fourth Proportional to 18,213.63, 27,255.42 and 13,221.78

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Solution

The fourth proportional to 18,213.63, 27,255.42 and 13,221.78 is: 19,785.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,213.63 : 27,255.42 = 13,221.78 : x
  2. Step 2: Convert to fraction form
    18,213.63/27,255.42 = 13,221.78/x
  3. Step 3: Cross multiply
    18,213.63x = 27,255.42 × 13,221.78
  4. Step 4: Simplify right side
    18,213.63x = 360,365,167.05
  5. Step 5: Solve for x
    x = 360,365,167.05/18,213.63
  6. Step 6: Final answer
    x = 19,785.47

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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.