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Finding the Fourth Proportional to 19,372.94, 29,033.88 and 7,679.78

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Solution

The fourth proportional to 19,372.94, 29,033.88 and 7,679.78 is: 11,509.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,372.94 : 29,033.88 = 7,679.78 : x
  2. Step 2: Convert to fraction form
    19,372.94/29,033.88 = 7,679.78/x
  3. Step 3: Cross multiply
    19,372.94x = 29,033.88 × 7,679.78
  4. Step 4: Simplify right side
    19,372.94x = 222,973,810.95
  5. Step 5: Solve for x
    x = 222,973,810.95/19,372.94
  6. Step 6: Final answer
    x = 11,509.55

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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.