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Finding the Fourth Proportional to 19,921.41, 29,871.05 and 9,236.09

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Solution

The fourth proportional to 19,921.41, 29,871.05 and 9,236.09 is: 13,849.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,921.41 : 29,871.05 = 9,236.09 : x
  2. Step 2: Convert to fraction form
    19,921.41/29,871.05 = 9,236.09/x
  3. Step 3: Cross multiply
    19,921.41x = 29,871.05 × 9,236.09
  4. Step 4: Simplify right side
    19,921.41x = 275,891,510.66
  5. Step 5: Solve for x
    x = 275,891,510.66/19,921.41
  6. Step 6: Final answer
    x = 13,849.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.