Home / 20,804.52-31,217.03-12,905.01

Finding the Fourth Proportional to 20,804.52, 31,217.03 and 12,905.01

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Solution

The fourth proportional to 20,804.52, 31,217.03 and 12,905.01 is: 19,363.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,804.52 : 31,217.03 = 12,905.01 : x
  2. Step 2: Convert to fraction form
    20,804.52/31,217.03 = 12,905.01/x
  3. Step 3: Cross multiply
    20,804.52x = 31,217.03 × 12,905.01
  4. Step 4: Simplify right side
    20,804.52x = 402,856,078.73
  5. Step 5: Solve for x
    x = 402,856,078.73/20,804.52
  6. Step 6: Final answer
    x = 19,363.87

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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.