Home / 20,936.34-28,892.82-11,505.12

Finding the Fourth Proportional to 20,936.34, 28,892.82 and 11,505.12

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Solution

The fourth proportional to 20,936.34, 28,892.82 and 11,505.12 is: 15,877.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,936.34 : 28,892.82 = 11,505.12 : x
  2. Step 2: Convert to fraction form
    20,936.34/28,892.82 = 11,505.12/x
  3. Step 3: Cross multiply
    20,936.34x = 28,892.82 × 11,505.12
  4. Step 4: Simplify right side
    20,936.34x = 332,415,361.24
  5. Step 5: Solve for x
    x = 332,415,361.24/20,936.34
  6. Step 6: Final answer
    x = 15,877.43

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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.