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Finding the Fourth Proportional to 20,950.92, 28,912.22 and 11,519.64

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Solution

The fourth proportional to 20,950.92, 28,912.22 and 11,519.64 is: 15,897.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,950.92 : 28,912.22 = 11,519.64 : x
  2. Step 2: Convert to fraction form
    20,950.92/28,912.22 = 11,519.64/x
  3. Step 3: Cross multiply
    20,950.92x = 28,912.22 × 11,519.64
  4. Step 4: Simplify right side
    20,950.92x = 333,058,366.00
  5. Step 5: Solve for x
    x = 333,058,366.00/20,950.92
  6. Step 6: Final answer
    x = 15,897.08

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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.