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Finding the Fourth Proportional to 20,926.97, 28,871.08 and 11,850.25

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Solution

The fourth proportional to 20,926.97, 28,871.08 and 11,850.25 is: 16,348.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,926.97 : 28,871.08 = 11,850.25 : x
  2. Step 2: Convert to fraction form
    20,926.97/28,871.08 = 11,850.25/x
  3. Step 3: Cross multiply
    20,926.97x = 28,871.08 × 11,850.25
  4. Step 4: Simplify right side
    20,926.97x = 342,129,405.91
  5. Step 5: Solve for x
    x = 342,129,405.91/20,926.97
  6. Step 6: Final answer
    x = 16,348.73

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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.