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Finding the Fourth Proportional to 20,314.56, 28,034.51 and 11,361.09

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Solution

The fourth proportional to 20,314.56, 28,034.51 and 11,361.09 is: 15,678.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,314.56 : 28,034.51 = 11,361.09 : x
  2. Step 2: Convert to fraction form
    20,314.56/28,034.51 = 11,361.09/x
  3. Step 3: Cross multiply
    20,314.56x = 28,034.51 × 11,361.09
  4. Step 4: Simplify right side
    20,314.56x = 318,502,534.41
  5. Step 5: Solve for x
    x = 318,502,534.41/20,314.56
  6. Step 6: Final answer
    x = 15,678.53

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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.