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Finding the Fourth Proportional to 20,466.96, 30,699.18 and 7,318.68

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Solution

The fourth proportional to 20,466.96, 30,699.18 and 7,318.68 is: 10,977.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,466.96 : 30,699.18 = 7,318.68 : x
  2. Step 2: Convert to fraction form
    20,466.96/30,699.18 = 7,318.68/x
  3. Step 3: Cross multiply
    20,466.96x = 30,699.18 × 7,318.68
  4. Step 4: Simplify right side
    20,466.96x = 224,677,474.68
  5. Step 5: Solve for x
    x = 224,677,474.68/20,466.96
  6. Step 6: Final answer
    x = 10,977.57

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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.