Home / 15,787.76-21,786.82-8,714.04

Finding the Fourth Proportional to 15,787.76, 21,786.82 and 8,714.04

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Solution

The fourth proportional to 15,787.76, 21,786.82 and 8,714.04 is: 12,025.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,787.76 : 21,786.82 = 8,714.04 : x
  2. Step 2: Convert to fraction form
    15,787.76/21,786.82 = 8,714.04/x
  3. Step 3: Cross multiply
    15,787.76x = 21,786.82 × 8,714.04
  4. Step 4: Simplify right side
    15,787.76x = 189,851,220.95
  5. Step 5: Solve for x
    x = 189,851,220.95/15,787.76
  6. Step 6: Final answer
    x = 12,025.22

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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.