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Finding the Fourth Proportional to 13,458.52, 20,187.16 and 5,558.90

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Solution

The fourth proportional to 13,458.52, 20,187.16 and 5,558.90 is: 8,338.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,458.52 : 20,187.16 = 5,558.90 : x
  2. Step 2: Convert to fraction form
    13,458.52/20,187.16 = 5,558.90/x
  3. Step 3: Cross multiply
    13,458.52x = 20,187.16 × 5,558.90
  4. Step 4: Simplify right side
    13,458.52x = 112,218,288.89
  5. Step 5: Solve for x
    x = 112,218,288.89/13,458.52
  6. Step 6: Final answer
    x = 8,338.08

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.