Home / 21,266.78-31,906.42-8,787.52

Finding the Fourth Proportional to 21,266.78, 31,906.42 and 8,787.52

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Solution

The fourth proportional to 21,266.78, 31,906.42 and 8,787.52 is: 13,183.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,266.78 : 31,906.42 = 8,787.52 : x
  2. Step 2: Convert to fraction form
    21,266.78/31,906.42 = 8,787.52/x
  3. Step 3: Cross multiply
    21,266.78x = 31,906.42 × 8,787.52
  4. Step 4: Simplify right side
    21,266.78x = 280,378,303.88
  5. Step 5: Solve for x
    x = 280,378,303.88/21,266.78
  6. Step 6: Final answer
    x = 13,183.86

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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.