Home / 20,914.28-28,850.82-16,939.88

Finding the Fourth Proportional to 20,914.28, 28,850.82 and 16,939.88

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Solution

The fourth proportional to 20,914.28, 28,850.82 and 16,939.88 is: 23,368.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,914.28 : 28,850.82 = 16,939.88 : x
  2. Step 2: Convert to fraction form
    20,914.28/28,850.82 = 16,939.88/x
  3. Step 3: Cross multiply
    20,914.28x = 28,850.82 × 16,939.88
  4. Step 4: Simplify right side
    20,914.28x = 488,729,428.70
  5. Step 5: Solve for x
    x = 488,729,428.70/20,914.28
  6. Step 6: Final answer
    x = 23,368.22

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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.