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Finding the Fourth Proportional to 15,169.81, 20,954.76 and 13,755.09

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Solution

The fourth proportional to 15,169.81, 20,954.76 and 13,755.09 is: 19,000.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,169.81 : 20,954.76 = 13,755.09 : x
  2. Step 2: Convert to fraction form
    15,169.81/20,954.76 = 13,755.09/x
  3. Step 3: Cross multiply
    15,169.81x = 20,954.76 × 13,755.09
  4. Step 4: Simplify right side
    15,169.81x = 288,234,609.73
  5. Step 5: Solve for x
    x = 288,234,609.73/15,169.81
  6. Step 6: Final answer
    x = 19,000.54

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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.