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Finding the Fourth Proportional to 12,679.59, 17,502.15 and 7,378.85

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Solution

The fourth proportional to 12,679.59, 17,502.15 and 7,378.85 is: 10,185.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,679.59 : 17,502.15 = 7,378.85 : x
  2. Step 2: Convert to fraction form
    12,679.59/17,502.15 = 7,378.85/x
  3. Step 3: Cross multiply
    12,679.59x = 17,502.15 × 7,378.85
  4. Step 4: Simplify right side
    12,679.59x = 129,145,691.75
  5. Step 5: Solve for x
    x = 129,145,691.75/12,679.59
  6. Step 6: Final answer
    x = 10,185.32

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.