Home / 20,912.08-28,856.76-11,959.28

Finding the Fourth Proportional to 20,912.08, 28,856.76 and 11,959.28

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Solution

The fourth proportional to 20,912.08, 28,856.76 and 11,959.28 is: 16,502.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.08 : 28,856.76 = 11,959.28 : x
  2. Step 2: Convert to fraction form
    20,912.08/28,856.76 = 11,959.28/x
  3. Step 3: Cross multiply
    20,912.08x = 28,856.76 × 11,959.28
  4. Step 4: Simplify right side
    20,912.08x = 345,106,072.73
  5. Step 5: Solve for x
    x = 345,106,072.73/20,912.08
  6. Step 6: Final answer
    x = 16,502.71

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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.