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Finding the Fourth Proportional to 29,076.88, 40,126.09 and 15,828.88

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Solution

The fourth proportional to 29,076.88, 40,126.09 and 15,828.88 is: 21,843.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,076.88 : 40,126.09 = 15,828.88 : x
  2. Step 2: Convert to fraction form
    29,076.88/40,126.09 = 15,828.88/x
  3. Step 3: Cross multiply
    29,076.88x = 40,126.09 × 15,828.88
  4. Step 4: Simplify right side
    29,076.88x = 635,150,862.85
  5. Step 5: Solve for x
    x = 635,150,862.85/29,076.88
  6. Step 6: Final answer
    x = 21,843.85

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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.