Home / 20,787.50-31,181.52-6,936.50

Finding the Fourth Proportional to 20,787.50, 31,181.52 and 6,936.50

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Solution

The fourth proportional to 20,787.50, 31,181.52 and 6,936.50 is: 10,404.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,787.50 : 31,181.52 = 6,936.50 : x
  2. Step 2: Convert to fraction form
    20,787.50/31,181.52 = 6,936.50/x
  3. Step 3: Cross multiply
    20,787.50x = 31,181.52 × 6,936.50
  4. Step 4: Simplify right side
    20,787.50x = 216,290,613.48
  5. Step 5: Solve for x
    x = 216,290,613.48/20,787.50
  6. Step 6: Final answer
    x = 10,404.84

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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.