Home / 20,731.90-31,103.92-6,694.10

Finding the Fourth Proportional to 20,731.90, 31,103.92 and 6,694.10

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Solution

The fourth proportional to 20,731.90, 31,103.92 and 6,694.10 is: 10,043.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.90 : 31,103.92 = 6,694.10 : x
  2. Step 2: Convert to fraction form
    20,731.90/31,103.92 = 6,694.10/x
  3. Step 3: Cross multiply
    20,731.90x = 31,103.92 × 6,694.10
  4. Step 4: Simplify right side
    20,731.90x = 208,212,750.87
  5. Step 5: Solve for x
    x = 208,212,750.87/20,731.90
  6. Step 6: Final answer
    x = 10,043.11

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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.