Home / 21,223.12-29,288.88-11,791.72

Finding the Fourth Proportional to 21,223.12, 29,288.88 and 11,791.72

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Solution

The fourth proportional to 21,223.12, 29,288.88 and 11,791.72 is: 16,273.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,223.12 : 29,288.88 = 11,791.72 : x
  2. Step 2: Convert to fraction form
    21,223.12/29,288.88 = 11,791.72/x
  3. Step 3: Cross multiply
    21,223.12x = 29,288.88 × 11,791.72
  4. Step 4: Simplify right side
    21,223.12x = 345,366,272.07
  5. Step 5: Solve for x
    x = 345,366,272.07/21,223.12
  6. Step 6: Final answer
    x = 16,273.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.