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Finding the Fourth Proportional to 20,517.76, 30,776.64 and 4,935.39

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Solution

The fourth proportional to 20,517.76, 30,776.64 and 4,935.39 is: 7,403.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,517.76 : 30,776.64 = 4,935.39 : x
  2. Step 2: Convert to fraction form
    20,517.76/30,776.64 = 4,935.39/x
  3. Step 3: Cross multiply
    20,517.76x = 30,776.64 × 4,935.39
  4. Step 4: Simplify right side
    20,517.76x = 151,894,721.29
  5. Step 5: Solve for x
    x = 151,894,721.29/20,517.76
  6. Step 6: Final answer
    x = 7,403.09

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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.