Home / 12,356.88-18,538.38-3,591.90

Finding the Fourth Proportional to 12,356.88, 18,538.38 and 3,591.90

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Solution

The fourth proportional to 12,356.88, 18,538.38 and 3,591.90 is: 5,388.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,356.88 : 18,538.38 = 3,591.90 : x
  2. Step 2: Convert to fraction form
    12,356.88/18,538.38 = 3,591.90/x
  3. Step 3: Cross multiply
    12,356.88x = 18,538.38 × 3,591.90
  4. Step 4: Simplify right side
    12,356.88x = 66,588,007.12
  5. Step 5: Solve for x
    x = 66,588,007.12/12,356.88
  6. Step 6: Final answer
    x = 5,388.74

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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.