Home / 18,513.72-27,731.70-13,512.78

Finding the Fourth Proportional to 18,513.72, 27,731.70 and 13,512.78

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Solution

The fourth proportional to 18,513.72, 27,731.70 and 13,512.78 is: 20,240.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,513.72 : 27,731.70 = 13,512.78 : x
  2. Step 2: Convert to fraction form
    18,513.72/27,731.70 = 13,512.78/x
  3. Step 3: Cross multiply
    18,513.72x = 27,731.70 × 13,512.78
  4. Step 4: Simplify right side
    18,513.72x = 374,732,361.13
  5. Step 5: Solve for x
    x = 374,732,361.13/18,513.72
  6. Step 6: Final answer
    x = 20,240.79

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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.