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Finding the Fourth Proportional to 19,491.25, 29,249.85 and 7,179.25

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Solution

The fourth proportional to 19,491.25, 29,249.85 and 7,179.25 is: 10,773.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,491.25 : 29,249.85 = 7,179.25 : x
  2. Step 2: Convert to fraction form
    19,491.25/29,249.85 = 7,179.25/x
  3. Step 3: Cross multiply
    19,491.25x = 29,249.85 × 7,179.25
  4. Step 4: Simplify right side
    19,491.25x = 209,991,985.61
  5. Step 5: Solve for x
    x = 209,991,985.61/19,491.25
  6. Step 6: Final answer
    x = 10,773.65

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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.