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Finding the Fourth Proportional to 15,753.06, 21,740.19 and 8,679.48

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Solution

The fourth proportional to 15,753.06, 21,740.19 and 8,679.48 is: 11,978.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,753.06 : 21,740.19 = 8,679.48 : x
  2. Step 2: Convert to fraction form
    15,753.06/21,740.19 = 8,679.48/x
  3. Step 3: Cross multiply
    15,753.06x = 21,740.19 × 8,679.48
  4. Step 4: Simplify right side
    15,753.06x = 188,693,544.30
  5. Step 5: Solve for x
    x = 188,693,544.30/15,753.06
  6. Step 6: Final answer
    x = 11,978.22

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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.