Home / 20,787.54-31,174.26-6,743.76

Finding the Fourth Proportional to 20,787.54, 31,174.26 and 6,743.76

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Solution

The fourth proportional to 20,787.54, 31,174.26 and 6,743.76 is: 10,113.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,787.54 : 31,174.26 = 6,743.76 : x
  2. Step 2: Convert to fraction form
    20,787.54/31,174.26 = 6,743.76/x
  3. Step 3: Cross multiply
    20,787.54x = 31,174.26 × 6,743.76
  4. Step 4: Simplify right side
    20,787.54x = 210,231,727.62
  5. Step 5: Solve for x
    x = 210,231,727.62/20,787.54
  6. Step 6: Final answer
    x = 10,113.35

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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.