Home / 20,912.07-28,858.30-11,480.57

Finding the Fourth Proportional to 20,912.07, 28,858.30 and 11,480.57

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Solution

The fourth proportional to 20,912.07, 28,858.30 and 11,480.57 is: 15,842.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.07 : 28,858.30 = 11,480.57 : x
  2. Step 2: Convert to fraction form
    20,912.07/28,858.30 = 11,480.57/x
  3. Step 3: Cross multiply
    20,912.07x = 28,858.30 × 11,480.57
  4. Step 4: Simplify right side
    20,912.07x = 331,309,560.24
  5. Step 5: Solve for x
    x = 331,309,560.24/20,912.07
  6. Step 6: Final answer
    x = 15,842.98

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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.