Home / 20,897.86-31,354.79-12,583.82

Finding the Fourth Proportional to 20,897.86, 31,354.79 and 12,583.82

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Solution

The fourth proportional to 20,897.86, 31,354.79 and 12,583.82 is: 18,880.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,897.86 : 31,354.79 = 12,583.82 : x
  2. Step 2: Convert to fraction form
    20,897.86/31,354.79 = 12,583.82/x
  3. Step 3: Cross multiply
    20,897.86x = 31,354.79 × 12,583.82
  4. Step 4: Simplify right side
    20,897.86x = 394,562,813.80
  5. Step 5: Solve for x
    x = 394,562,813.80/20,897.86
  6. Step 6: Final answer
    x = 18,880.54

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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.