Home / 20,905.33-28,844.61-11,951.39

Finding the Fourth Proportional to 20,905.33, 28,844.61 and 11,951.39

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Solution

The fourth proportional to 20,905.33, 28,844.61 and 11,951.39 is: 16,490.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,905.33 : 28,844.61 = 11,951.39 : x
  2. Step 2: Convert to fraction form
    20,905.33/28,844.61 = 11,951.39/x
  3. Step 3: Cross multiply
    20,905.33x = 28,844.61 × 11,951.39
  4. Step 4: Simplify right side
    20,905.33x = 344,733,039.28
  5. Step 5: Solve for x
    x = 344,733,039.28/20,905.33
  6. Step 6: Final answer
    x = 16,490.20

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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.