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Finding the Fourth Proportional to 18,791.45, 28,040.13 and 18,682.10

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Solution

The fourth proportional to 18,791.45, 28,040.13 and 18,682.10 is: 27,876.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,791.45 : 28,040.13 = 18,682.10 : x
  2. Step 2: Convert to fraction form
    18,791.45/28,040.13 = 18,682.10/x
  3. Step 3: Cross multiply
    18,791.45x = 28,040.13 × 18,682.10
  4. Step 4: Simplify right side
    18,791.45x = 523,848,512.67
  5. Step 5: Solve for x
    x = 523,848,512.67/18,791.45
  6. Step 6: Final answer
    x = 27,876.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.