Home / 20,936.91-28,891.26-11,982.36

Finding the Fourth Proportional to 20,936.91, 28,891.26 and 11,982.36

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Solution

The fourth proportional to 20,936.91, 28,891.26 and 11,982.36 is: 16,534.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,936.91 : 28,891.26 = 11,982.36 : x
  2. Step 2: Convert to fraction form
    20,936.91/28,891.26 = 11,982.36/x
  3. Step 3: Cross multiply
    20,936.91x = 28,891.26 × 11,982.36
  4. Step 4: Simplify right side
    20,936.91x = 346,185,478.17
  5. Step 5: Solve for x
    x = 346,185,478.17/20,936.91
  6. Step 6: Final answer
    x = 16,534.70

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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.