Home / 21,279.43-31,923.94-6,489.85

Finding the Fourth Proportional to 21,279.43, 31,923.94 and 6,489.85

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Solution

The fourth proportional to 21,279.43, 31,923.94 and 6,489.85 is: 9,736.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,279.43 : 31,923.94 = 6,489.85 : x
  2. Step 2: Convert to fraction form
    21,279.43/31,923.94 = 6,489.85/x
  3. Step 3: Cross multiply
    21,279.43x = 31,923.94 × 6,489.85
  4. Step 4: Simplify right side
    21,279.43x = 207,181,440.84
  5. Step 5: Solve for x
    x = 207,181,440.84/21,279.43
  6. Step 6: Final answer
    x = 9,736.23

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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.