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Finding the Fourth Proportional to 21,049.18, 29,051.01 and 13,504.03

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Solution

The fourth proportional to 21,049.18, 29,051.01 and 13,504.03 is: 18,637.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,049.18 : 29,051.01 = 13,504.03 : x
  2. Step 2: Convert to fraction form
    21,049.18/29,051.01 = 13,504.03/x
  3. Step 3: Cross multiply
    21,049.18x = 29,051.01 × 13,504.03
  4. Step 4: Simplify right side
    21,049.18x = 392,305,710.57
  5. Step 5: Solve for x
    x = 392,305,710.57/21,049.18
  6. Step 6: Final answer
    x = 18,637.58

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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.