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Finding the Fourth Proportional to 8,420.72, 11,619.96 and 4,694

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Solution

The fourth proportional to 8,420.72, 11,619.96 and 4,694 is: 6,477.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.72 : 11,619.96 = 4,694 : x
  2. Step 2: Convert to fraction form
    8,420.72/11,619.96 = 4,694/x
  3. Step 3: Cross multiply
    8,420.72x = 11,619.96 × 4,694
  4. Step 4: Simplify right side
    8,420.72x = 54,544,092.24
  5. Step 5: Solve for x
    x = 54,544,092.24/8,420.72
  6. Step 6: Final answer
    x = 6,477.37

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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.