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Finding the Fourth Proportional to 20,793.40, 28,695.02 and 11,841.56

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Solution

The fourth proportional to 20,793.40, 28,695.02 and 11,841.56 is: 16,341.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,793.40 : 28,695.02 = 11,841.56 : x
  2. Step 2: Convert to fraction form
    20,793.40/28,695.02 = 11,841.56/x
  3. Step 3: Cross multiply
    20,793.40x = 28,695.02 × 11,841.56
  4. Step 4: Simplify right side
    20,793.40x = 339,793,801.03
  5. Step 5: Solve for x
    x = 339,793,801.03/20,793.40
  6. Step 6: Final answer
    x = 16,341.43

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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.