Home / 20,982.10-31,473.15-7,131.10

Finding the Fourth Proportional to 20,982.10, 31,473.15 and 7,131.10

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Solution

The fourth proportional to 20,982.10, 31,473.15 and 7,131.10 is: 10,696.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,982.10 : 31,473.15 = 7,131.10 : x
  2. Step 2: Convert to fraction form
    20,982.10/31,473.15 = 7,131.10/x
  3. Step 3: Cross multiply
    20,982.10x = 31,473.15 × 7,131.10
  4. Step 4: Simplify right side
    20,982.10x = 224,438,179.97
  5. Step 5: Solve for x
    x = 224,438,179.97/20,982.10
  6. Step 6: Final answer
    x = 10,696.65

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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.