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Finding the Fourth Proportional to 21,198.80, 29,241.24 and 14,028.80

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Solution

The fourth proportional to 21,198.80, 29,241.24 and 14,028.80 is: 19,351.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,198.80 : 29,241.24 = 14,028.80 : x
  2. Step 2: Convert to fraction form
    21,198.80/29,241.24 = 14,028.80/x
  3. Step 3: Cross multiply
    21,198.80x = 29,241.24 × 14,028.80
  4. Step 4: Simplify right side
    21,198.80x = 410,219,507.71
  5. Step 5: Solve for x
    x = 410,219,507.71/21,198.80
  6. Step 6: Final answer
    x = 19,351.07

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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.