Home / 21,187.41-31,791.48-8,536.64

Finding the Fourth Proportional to 21,187.41, 31,791.48 and 8,536.64

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Solution

The fourth proportional to 21,187.41, 31,791.48 and 8,536.64 is: 12,809.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,187.41 : 31,791.48 = 8,536.64 : x
  2. Step 2: Convert to fraction form
    21,187.41/31,791.48 = 8,536.64/x
  3. Step 3: Cross multiply
    21,187.41x = 31,791.48 × 8,536.64
  4. Step 4: Simplify right side
    21,187.41x = 271,392,419.83
  5. Step 5: Solve for x
    x = 271,392,419.83/21,187.41
  6. Step 6: Final answer
    x = 12,809.14

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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.