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Finding the Fourth Proportional to 18,679.68, 25,776.90 and 11,134.53

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Solution

The fourth proportional to 18,679.68, 25,776.90 and 11,134.53 is: 15,365.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,679.68 : 25,776.90 = 11,134.53 : x
  2. Step 2: Convert to fraction form
    18,679.68/25,776.90 = 11,134.53/x
  3. Step 3: Cross multiply
    18,679.68x = 25,776.90 × 11,134.53
  4. Step 4: Simplify right side
    18,679.68x = 287,013,666.36
  5. Step 5: Solve for x
    x = 287,013,666.36/18,679.68
  6. Step 6: Final answer
    x = 15,365.02

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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.