Home / 21,279.73-31,923.39-7,239.04

Finding the Fourth Proportional to 21,279.73, 31,923.39 and 7,239.04

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Solution

The fourth proportional to 21,279.73, 31,923.39 and 7,239.04 is: 10,859.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,279.73 : 31,923.39 = 7,239.04 : x
  2. Step 2: Convert to fraction form
    21,279.73/31,923.39 = 7,239.04/x
  3. Step 3: Cross multiply
    21,279.73x = 31,923.39 × 7,239.04
  4. Step 4: Simplify right side
    21,279.73x = 231,094,697.15
  5. Step 5: Solve for x
    x = 231,094,697.15/21,279.73
  6. Step 6: Final answer
    x = 10,859.85

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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.