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Finding the Fourth Proportional to 20,656.81, 28,506.42 and 11,704.92

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Solution

The fourth proportional to 20,656.81, 28,506.42 and 11,704.92 is: 16,152.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,656.81 : 28,506.42 = 11,704.92 : x
  2. Step 2: Convert to fraction form
    20,656.81/28,506.42 = 11,704.92/x
  3. Step 3: Cross multiply
    20,656.81x = 28,506.42 × 11,704.92
  4. Step 4: Simplify right side
    20,656.81x = 333,665,365.59
  5. Step 5: Solve for x
    x = 333,665,365.59/20,656.81
  6. Step 6: Final answer
    x = 16,152.80

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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.