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Finding the Fourth Proportional to 20,835.82, 28,754.03 and 11,404.99

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Solution

The fourth proportional to 20,835.82, 28,754.03 and 11,404.99 is: 15,739.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,835.82 : 28,754.03 = 11,404.99 : x
  2. Step 2: Convert to fraction form
    20,835.82/28,754.03 = 11,404.99/x
  3. Step 3: Cross multiply
    20,835.82x = 28,754.03 × 11,404.99
  4. Step 4: Simplify right side
    20,835.82x = 327,939,424.61
  5. Step 5: Solve for x
    x = 327,939,424.61/20,835.82
  6. Step 6: Final answer
    x = 15,739.21

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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.