Home / 20,891.64-28,830.60-11,939.48

Finding the Fourth Proportional to 20,891.64, 28,830.60 and 11,939.48

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Solution

The fourth proportional to 20,891.64, 28,830.60 and 11,939.48 is: 16,476.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,891.64 : 28,830.60 = 11,939.48 : x
  2. Step 2: Convert to fraction form
    20,891.64/28,830.60 = 11,939.48/x
  3. Step 3: Cross multiply
    20,891.64x = 28,830.60 × 11,939.48
  4. Step 4: Simplify right side
    20,891.64x = 344,222,168.24
  5. Step 5: Solve for x
    x = 344,222,168.24/20,891.64
  6. Step 6: Final answer
    x = 16,476.55

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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.