Home / 18,787.53-28,170.75-12,871.10

Finding the Fourth Proportional to 18,787.53, 28,170.75 and 12,871.10

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Solution

The fourth proportional to 18,787.53, 28,170.75 and 12,871.10 is: 19,299.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,787.53 : 28,170.75 = 12,871.10 : x
  2. Step 2: Convert to fraction form
    18,787.53/28,170.75 = 12,871.10/x
  3. Step 3: Cross multiply
    18,787.53x = 28,170.75 × 12,871.10
  4. Step 4: Simplify right side
    18,787.53x = 362,588,540.33
  5. Step 5: Solve for x
    x = 362,588,540.33/18,787.53
  6. Step 6: Final answer
    x = 19,299.43

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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.