Home / 15,787.41-21,787.08-8,714.28

Finding the Fourth Proportional to 15,787.41, 21,787.08 and 8,714.28

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Solution

The fourth proportional to 15,787.41, 21,787.08 and 8,714.28 is: 12,025.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,787.41 : 21,787.08 = 8,714.28 : x
  2. Step 2: Convert to fraction form
    15,787.41/21,787.08 = 8,714.28/x
  3. Step 3: Cross multiply
    15,787.41x = 21,787.08 × 8,714.28
  4. Step 4: Simplify right side
    15,787.41x = 189,858,764.53
  5. Step 5: Solve for x
    x = 189,858,764.53/15,787.41
  6. Step 6: Final answer
    x = 12,025.96

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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.