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Finding the Fourth Proportional to 13,201.10, 18,215.79 and 7,893.98

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Solution

The fourth proportional to 13,201.10, 18,215.79 and 7,893.98 is: 10,892.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,201.10 : 18,215.79 = 7,893.98 : x
  2. Step 2: Convert to fraction form
    13,201.10/18,215.79 = 7,893.98/x
  3. Step 3: Cross multiply
    13,201.10x = 18,215.79 × 7,893.98
  4. Step 4: Simplify right side
    13,201.10x = 143,795,081.94
  5. Step 5: Solve for x
    x = 143,795,081.94/13,201.10
  6. Step 6: Final answer
    x = 10,892.66

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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.