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Finding the Fourth Proportional to 19,901.21, 29,849.03 and 7,419.62

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Solution

The fourth proportional to 19,901.21, 29,849.03 and 7,419.62 is: 11,128.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,901.21 : 29,849.03 = 7,419.62 : x
  2. Step 2: Convert to fraction form
    19,901.21/29,849.03 = 7,419.62/x
  3. Step 3: Cross multiply
    19,901.21x = 29,849.03 × 7,419.62
  4. Step 4: Simplify right side
    19,901.21x = 221,468,273.63
  5. Step 5: Solve for x
    x = 221,468,273.63/19,901.21
  6. Step 6: Final answer
    x = 11,128.39

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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.