Home / 21,222.78-29,288.34-11,791.32

Finding the Fourth Proportional to 21,222.78, 29,288.34 and 11,791.32

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Solution

The fourth proportional to 21,222.78, 29,288.34 and 11,791.32 is: 16,272.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,222.78 : 29,288.34 = 11,791.32 : x
  2. Step 2: Convert to fraction form
    21,222.78/29,288.34 = 11,791.32/x
  3. Step 3: Cross multiply
    21,222.78x = 29,288.34 × 11,791.32
  4. Step 4: Simplify right side
    21,222.78x = 345,348,189.21
  5. Step 5: Solve for x
    x = 345,348,189.21/21,222.78
  6. Step 6: Final answer
    x = 16,272.52

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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.