Home / 21,278.22-31,920.79-6,286.86

Finding the Fourth Proportional to 21,278.22, 31,920.79 and 6,286.86

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Solution

The fourth proportional to 21,278.22, 31,920.79 and 6,286.86 is: 9,431.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.22 : 31,920.79 = 6,286.86 : x
  2. Step 2: Convert to fraction form
    21,278.22/31,920.79 = 6,286.86/x
  3. Step 3: Cross multiply
    21,278.22x = 31,920.79 × 6,286.86
  4. Step 4: Simplify right side
    21,278.22x = 200,681,537.82
  5. Step 5: Solve for x
    x = 200,681,537.82/21,278.22
  6. Step 6: Final answer
    x = 9,431.31

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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.