Home / 18,787.20-28,180.80-4,936

Finding the Fourth Proportional to 18,787.20, 28,180.80 and 4,936

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Solution

The fourth proportional to 18,787.20, 28,180.80 and 4,936 is: 7,404.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,787.20 : 28,180.80 = 4,936 : x
  2. Step 2: Convert to fraction form
    18,787.20/28,180.80 = 4,936/x
  3. Step 3: Cross multiply
    18,787.20x = 28,180.80 × 4,936
  4. Step 4: Simplify right side
    18,787.20x = 139,100,428.80
  5. Step 5: Solve for x
    x = 139,100,428.80/18,787.20
  6. Step 6: Final answer
    x = 7,404.00

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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.