Home / 11,521.78-17,278.32-3,728.50

Finding the Fourth Proportional to 11,521.78, 17,278.32 and 3,728.50

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Solution

The fourth proportional to 11,521.78, 17,278.32 and 3,728.50 is: 5,591.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,521.78 : 17,278.32 = 3,728.50 : x
  2. Step 2: Convert to fraction form
    11,521.78/17,278.32 = 3,728.50/x
  3. Step 3: Cross multiply
    11,521.78x = 17,278.32 × 3,728.50
  4. Step 4: Simplify right side
    11,521.78x = 64,422,216.12
  5. Step 5: Solve for x
    x = 64,422,216.12/11,521.78
  6. Step 6: Final answer
    x = 5,591.34

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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.