Home / 19,986.75-29,981.75-8,141.31

Finding the Fourth Proportional to 19,986.75, 29,981.75 and 8,141.31

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Solution

The fourth proportional to 19,986.75, 29,981.75 and 8,141.31 is: 12,212.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,986.75 : 29,981.75 = 8,141.31 : x
  2. Step 2: Convert to fraction form
    19,986.75/29,981.75 = 8,141.31/x
  3. Step 3: Cross multiply
    19,986.75x = 29,981.75 × 8,141.31
  4. Step 4: Simplify right side
    19,986.75x = 244,090,680.39
  5. Step 5: Solve for x
    x = 244,090,680.39/19,986.75
  6. Step 6: Final answer
    x = 12,212.62

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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.