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Finding the Fourth Proportional to 20,736.30, 28,616.01 and 11,304.87

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Solution

The fourth proportional to 20,736.30, 28,616.01 and 11,304.87 is: 15,600.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,736.30 : 28,616.01 = 11,304.87 : x
  2. Step 2: Convert to fraction form
    20,736.30/28,616.01 = 11,304.87/x
  3. Step 3: Cross multiply
    20,736.30x = 28,616.01 × 11,304.87
  4. Step 4: Simplify right side
    20,736.30x = 323,500,272.97
  5. Step 5: Solve for x
    x = 323,500,272.97/20,736.30
  6. Step 6: Final answer
    x = 15,600.67

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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.