Home / 20,813.30-28,731.73-13,269.75

Finding the Fourth Proportional to 20,813.30, 28,731.73 and 13,269.75

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Solution

The fourth proportional to 20,813.30, 28,731.73 and 13,269.75 is: 18,318.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,813.30 : 28,731.73 = 13,269.75 : x
  2. Step 2: Convert to fraction form
    20,813.30/28,731.73 = 13,269.75/x
  3. Step 3: Cross multiply
    20,813.30x = 28,731.73 × 13,269.75
  4. Step 4: Simplify right side
    20,813.30x = 381,262,874.17
  5. Step 5: Solve for x
    x = 381,262,874.17/20,813.30
  6. Step 6: Final answer
    x = 18,318.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.