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Finding the Fourth Proportional to 20,551.72, 30,834.06 and 8,870.44

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Solution

The fourth proportional to 20,551.72, 30,834.06 and 8,870.44 is: 13,308.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,551.72 : 30,834.06 = 8,870.44 : x
  2. Step 2: Convert to fraction form
    20,551.72/30,834.06 = 8,870.44/x
  3. Step 3: Cross multiply
    20,551.72x = 30,834.06 × 8,870.44
  4. Step 4: Simplify right side
    20,551.72x = 273,511,679.19
  5. Step 5: Solve for x
    x = 273,511,679.19/20,551.72
  6. Step 6: Final answer
    x = 13,308.46

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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.