Home / 11,787.90-17,679.84-3,888

Finding the Fourth Proportional to 11,787.90, 17,679.84 and 3,888

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Solution

The fourth proportional to 11,787.90, 17,679.84 and 3,888 is: 5,831.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,787.90 : 17,679.84 = 3,888 : x
  2. Step 2: Convert to fraction form
    11,787.90/17,679.84 = 3,888/x
  3. Step 3: Cross multiply
    11,787.90x = 17,679.84 × 3,888
  4. Step 4: Simplify right side
    11,787.90x = 68,739,217.92
  5. Step 5: Solve for x
    x = 68,739,217.92/11,787.90
  6. Step 6: Final answer
    x = 5,831.34

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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.