Home / 21,290.96-31,936.44-8,147.36

Finding the Fourth Proportional to 21,290.96, 31,936.44 and 8,147.36

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Solution

The fourth proportional to 21,290.96, 31,936.44 and 8,147.36 is: 12,221.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.96 : 31,936.44 = 8,147.36 : x
  2. Step 2: Convert to fraction form
    21,290.96/31,936.44 = 8,147.36/x
  3. Step 3: Cross multiply
    21,290.96x = 31,936.44 × 8,147.36
  4. Step 4: Simplify right side
    21,290.96x = 260,197,673.80
  5. Step 5: Solve for x
    x = 260,197,673.80/21,290.96
  6. Step 6: Final answer
    x = 12,221.04

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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.