Home / 20,640.30-28,481.67-14,273.70

Finding the Fourth Proportional to 20,640.30, 28,481.67 and 14,273.70

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Solution

The fourth proportional to 20,640.30, 28,481.67 and 14,273.70 is: 19,696.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.30 : 28,481.67 = 14,273.70 : x
  2. Step 2: Convert to fraction form
    20,640.30/28,481.67 = 14,273.70/x
  3. Step 3: Cross multiply
    20,640.30x = 28,481.67 × 14,273.70
  4. Step 4: Simplify right side
    20,640.30x = 406,538,813.08
  5. Step 5: Solve for x
    x = 406,538,813.08/20,640.30
  6. Step 6: Final answer
    x = 19,696.36

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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.