Home / 21,277.96-31,919.05-8,141.38

Finding the Fourth Proportional to 21,277.96, 31,919.05 and 8,141.38

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Solution

The fourth proportional to 21,277.96, 31,919.05 and 8,141.38 is: 12,212.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,277.96 : 31,919.05 = 8,141.38 : x
  2. Step 2: Convert to fraction form
    21,277.96/31,919.05 = 8,141.38/x
  3. Step 3: Cross multiply
    21,277.96x = 31,919.05 × 8,141.38
  4. Step 4: Simplify right side
    21,277.96x = 259,864,935.34
  5. Step 5: Solve for x
    x = 259,864,935.34/21,277.96
  6. Step 6: Final answer
    x = 12,212.87

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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.