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Finding the Fourth Proportional to 20,676, 28,532.88 and 11,244.77

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Solution

The fourth proportional to 20,676, 28,532.88 and 11,244.77 is: 15,517.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,676 : 28,532.88 = 11,244.77 : x
  2. Step 2: Convert to fraction form
    20,676/28,532.88 = 11,244.77/x
  3. Step 3: Cross multiply
    20,676x = 28,532.88 × 11,244.77
  4. Step 4: Simplify right side
    20,676x = 320,845,530.37
  5. Step 5: Solve for x
    x = 320,845,530.37/20,676
  6. Step 6: Final answer
    x = 15,517.78

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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.