Home / 20,669.86-31,004.10-8,983.09

Finding the Fourth Proportional to 20,669.86, 31,004.10 and 8,983.09

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Solution

The fourth proportional to 20,669.86, 31,004.10 and 8,983.09 is: 13,474.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,669.86 : 31,004.10 = 8,983.09 : x
  2. Step 2: Convert to fraction form
    20,669.86/31,004.10 = 8,983.09/x
  3. Step 3: Cross multiply
    20,669.86x = 31,004.10 × 8,983.09
  4. Step 4: Simplify right side
    20,669.86x = 278,512,620.67
  5. Step 5: Solve for x
    x = 278,512,620.67/20,669.86
  6. Step 6: Final answer
    x = 13,474.34

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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.