Home / 20,942.88-28,901.82-11,993.28

Finding the Fourth Proportional to 20,942.88, 28,901.82 and 11,993.28

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Solution

The fourth proportional to 20,942.88, 28,901.82 and 11,993.28 is: 16,551.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,942.88 : 28,901.82 = 11,993.28 : x
  2. Step 2: Convert to fraction form
    20,942.88/28,901.82 = 11,993.28/x
  3. Step 3: Cross multiply
    20,942.88x = 28,901.82 × 11,993.28
  4. Step 4: Simplify right side
    20,942.88x = 346,627,619.77
  5. Step 5: Solve for x
    x = 346,627,619.77/20,942.88
  6. Step 6: Final answer
    x = 16,551.10

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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.