Home / 20,969.88-31,456.80-6,930

Finding the Fourth Proportional to 20,969.88, 31,456.80 and 6,930

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Solution

The fourth proportional to 20,969.88, 31,456.80 and 6,930 is: 10,395.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,969.88 : 31,456.80 = 6,930 : x
  2. Step 2: Convert to fraction form
    20,969.88/31,456.80 = 6,930/x
  3. Step 3: Cross multiply
    20,969.88x = 31,456.80 × 6,930
  4. Step 4: Simplify right side
    20,969.88x = 217,995,624
  5. Step 5: Solve for x
    x = 217,995,624/20,969.88
  6. Step 6: Final answer
    x = 10,395.65

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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.