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Finding the Fourth Proportional to 18,791.72, 28,186.94 and 8,935.72

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Solution

The fourth proportional to 18,791.72, 28,186.94 and 8,935.72 is: 13,403.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,791.72 : 28,186.94 = 8,935.72 : x
  2. Step 2: Convert to fraction form
    18,791.72/28,186.94 = 8,935.72/x
  3. Step 3: Cross multiply
    18,791.72x = 28,186.94 × 8,935.72
  4. Step 4: Simplify right side
    18,791.72x = 251,870,603.50
  5. Step 5: Solve for x
    x = 251,870,603.50/18,791.72
  6. Step 6: Final answer
    x = 13,403.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.