Home / 20,731.03-28,620.68-13,669.76

Finding the Fourth Proportional to 20,731.03, 28,620.68 and 13,669.76

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Solution

The fourth proportional to 20,731.03, 28,620.68 and 13,669.76 is: 18,872.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.03 : 28,620.68 = 13,669.76 : x
  2. Step 2: Convert to fraction form
    20,731.03/28,620.68 = 13,669.76/x
  3. Step 3: Cross multiply
    20,731.03x = 28,620.68 × 13,669.76
  4. Step 4: Simplify right side
    20,731.03x = 391,237,829.84
  5. Step 5: Solve for x
    x = 391,237,829.84/20,731.03
  6. Step 6: Final answer
    x = 18,872.09

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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.