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Finding the Fourth Proportional to 21,649.44, 29,846.48 and 13,687.68

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Solution

The fourth proportional to 21,649.44, 29,846.48 and 13,687.68 is: 18,870.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,649.44 : 29,846.48 = 13,687.68 : x
  2. Step 2: Convert to fraction form
    21,649.44/29,846.48 = 13,687.68/x
  3. Step 3: Cross multiply
    21,649.44x = 29,846.48 × 13,687.68
  4. Step 4: Simplify right side
    21,649.44x = 408,529,067.37
  5. Step 5: Solve for x
    x = 408,529,067.37/21,649.44
  6. Step 6: Final answer
    x = 18,870.19

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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.