Home / 15,787.82-21,786.99-8,714.09

Finding the Fourth Proportional to 15,787.82, 21,786.99 and 8,714.09

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Solution

The fourth proportional to 15,787.82, 21,786.99 and 8,714.09 is: 12,025.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,787.82 : 21,786.99 = 8,714.09 : x
  2. Step 2: Convert to fraction form
    15,787.82/21,786.99 = 8,714.09/x
  3. Step 3: Cross multiply
    15,787.82x = 21,786.99 × 8,714.09
  4. Step 4: Simplify right side
    15,787.82x = 189,853,682.75
  5. Step 5: Solve for x
    x = 189,853,682.75/15,787.82
  6. Step 6: Final answer
    x = 12,025.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.