Home / 21,078.90-31,620.16-5,496.50

Finding the Fourth Proportional to 21,078.90, 31,620.16 and 5,496.50

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Solution

The fourth proportional to 21,078.90, 31,620.16 and 5,496.50 is: 8,245.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,078.90 : 31,620.16 = 5,496.50 : x
  2. Step 2: Convert to fraction form
    21,078.90/31,620.16 = 5,496.50/x
  3. Step 3: Cross multiply
    21,078.90x = 31,620.16 × 5,496.50
  4. Step 4: Simplify right side
    21,078.90x = 173,800,209.44
  5. Step 5: Solve for x
    x = 173,800,209.44/21,078.90
  6. Step 6: Final answer
    x = 8,245.22

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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.