Home / 20,945.25-28,912.05-13,873.95

Finding the Fourth Proportional to 20,945.25, 28,912.05 and 13,873.95

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Solution

The fourth proportional to 20,945.25, 28,912.05 and 13,873.95 is: 19,151.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.25 : 28,912.05 = 13,873.95 : x
  2. Step 2: Convert to fraction form
    20,945.25/28,912.05 = 13,873.95/x
  3. Step 3: Cross multiply
    20,945.25x = 28,912.05 × 13,873.95
  4. Step 4: Simplify right side
    20,945.25x = 401,124,336.10
  5. Step 5: Solve for x
    x = 401,124,336.10/20,945.25
  6. Step 6: Final answer
    x = 19,151.09

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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.