Home / 20,731.92-31,097.89-6,880.92

Finding the Fourth Proportional to 20,731.92, 31,097.89 and 6,880.92

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Solution

The fourth proportional to 20,731.92, 31,097.89 and 6,880.92 is: 10,321.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.92 : 31,097.89 = 6,880.92 : x
  2. Step 2: Convert to fraction form
    20,731.92/31,097.89 = 6,880.92/x
  3. Step 3: Cross multiply
    20,731.92x = 31,097.89 × 6,880.92
  4. Step 4: Simplify right side
    20,731.92x = 213,982,121.46
  5. Step 5: Solve for x
    x = 213,982,121.46/20,731.92
  6. Step 6: Final answer
    x = 10,321.38

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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.