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Finding the Fourth Proportional to 20,672.16, 28,527.44 and 11,240.72

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Solution

The fourth proportional to 20,672.16, 28,527.44 and 11,240.72 is: 15,512.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,672.16 : 28,527.44 = 11,240.72 : x
  2. Step 2: Convert to fraction form
    20,672.16/28,527.44 = 11,240.72/x
  3. Step 3: Cross multiply
    20,672.16x = 28,527.44 × 11,240.72
  4. Step 4: Simplify right side
    20,672.16x = 320,669,097.19
  5. Step 5: Solve for x
    x = 320,669,097.19/20,672.16
  6. Step 6: Final answer
    x = 15,512.12

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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.