Home / 20,808.62-31,220.81-12,494.44

Finding the Fourth Proportional to 20,808.62, 31,220.81 and 12,494.44

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Solution

The fourth proportional to 20,808.62, 31,220.81 and 12,494.44 is: 18,746.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,808.62 : 31,220.81 = 12,494.44 : x
  2. Step 2: Convert to fraction form
    20,808.62/31,220.81 = 12,494.44/x
  3. Step 3: Cross multiply
    20,808.62x = 31,220.81 × 12,494.44
  4. Step 4: Simplify right side
    20,808.62x = 390,086,537.30
  5. Step 5: Solve for x
    x = 390,086,537.30/20,808.62
  6. Step 6: Final answer
    x = 18,746.39

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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.