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Finding the Fourth Proportional to 12,010.39, 18,018.21 and 3,691

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Solution

The fourth proportional to 12,010.39, 18,018.21 and 3,691 is: 5,537.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,010.39 : 18,018.21 = 3,691 : x
  2. Step 2: Convert to fraction form
    12,010.39/18,018.21 = 3,691/x
  3. Step 3: Cross multiply
    12,010.39x = 18,018.21 × 3,691
  4. Step 4: Simplify right side
    12,010.39x = 66,505,213.11
  5. Step 5: Solve for x
    x = 66,505,213.11/12,010.39
  6. Step 6: Final answer
    x = 5,537.31

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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.