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Finding the Fourth Proportional to 20,512.88, 30,772 and 7,366.72

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Solution

The fourth proportional to 20,512.88, 30,772 and 7,366.72 is: 11,051.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,512.88 : 30,772 = 7,366.72 : x
  2. Step 2: Convert to fraction form
    20,512.88/30,772 = 7,366.72/x
  3. Step 3: Cross multiply
    20,512.88x = 30,772 × 7,366.72
  4. Step 4: Simplify right side
    20,512.88x = 226,688,707.84
  5. Step 5: Solve for x
    x = 226,688,707.84/20,512.88
  6. Step 6: Final answer
    x = 11,051.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.