Home / 20,989.36-28,956.18-12,601

Finding the Fourth Proportional to 20,989.36, 28,956.18 and 12,601

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Solution

The fourth proportional to 20,989.36, 28,956.18 and 12,601 is: 17,383.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.36 : 28,956.18 = 12,601 : x
  2. Step 2: Convert to fraction form
    20,989.36/28,956.18 = 12,601/x
  3. Step 3: Cross multiply
    20,989.36x = 28,956.18 × 12,601
  4. Step 4: Simplify right side
    20,989.36x = 364,876,824.18
  5. Step 5: Solve for x
    x = 364,876,824.18/20,989.36
  6. Step 6: Final answer
    x = 17,383.89

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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.