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Finding the Fourth Proportional to 15,563.37, 21,477.36 and 8,489.79

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Solution

The fourth proportional to 15,563.37, 21,477.36 and 8,489.79 is: 11,715.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,563.37 : 21,477.36 = 8,489.79 : x
  2. Step 2: Convert to fraction form
    15,563.37/21,477.36 = 8,489.79/x
  3. Step 3: Cross multiply
    15,563.37x = 21,477.36 × 8,489.79
  4. Step 4: Simplify right side
    15,563.37x = 182,338,276.15
  5. Step 5: Solve for x
    x = 182,338,276.15/15,563.37
  6. Step 6: Final answer
    x = 11,715.86

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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.