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Finding the Fourth Proportional to 28,706.13, 39,613.05 and 16,769.97

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Solution

The fourth proportional to 28,706.13, 39,613.05 and 16,769.97 is: 23,141.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,706.13 : 39,613.05 = 16,769.97 : x
  2. Step 2: Convert to fraction form
    28,706.13/39,613.05 = 16,769.97/x
  3. Step 3: Cross multiply
    28,706.13x = 39,613.05 × 16,769.97
  4. Step 4: Simplify right side
    28,706.13x = 664,309,660.11
  5. Step 5: Solve for x
    x = 664,309,660.11/28,706.13
  6. Step 6: Final answer
    x = 23,141.74

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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.