Home / 20,787.76-31,181.56-6,759.44

Finding the Fourth Proportional to 20,787.76, 31,181.56 and 6,759.44

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Solution

The fourth proportional to 20,787.76, 31,181.56 and 6,759.44 is: 10,139.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,787.76 : 31,181.56 = 6,759.44 : x
  2. Step 2: Convert to fraction form
    20,787.76/31,181.56 = 6,759.44/x
  3. Step 3: Cross multiply
    20,787.76x = 31,181.56 × 6,759.44
  4. Step 4: Simplify right side
    20,787.76x = 210,769,883.93
  5. Step 5: Solve for x
    x = 210,769,883.93/20,787.76
  6. Step 6: Final answer
    x = 10,139.13

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1.5x scale

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.