Home / 19,769.79-29,665.62-8,091.21

Finding the Fourth Proportional to 19,769.79, 29,665.62 and 8,091.21

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Solution

The fourth proportional to 19,769.79, 29,665.62 and 8,091.21 is: 12,141.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,769.79 : 29,665.62 = 8,091.21 : x
  2. Step 2: Convert to fraction form
    19,769.79/29,665.62 = 8,091.21/x
  3. Step 3: Cross multiply
    19,769.79x = 29,665.62 × 8,091.21
  4. Step 4: Simplify right side
    19,769.79x = 240,030,761.20
  5. Step 5: Solve for x
    x = 240,030,761.20/19,769.79
  6. Step 6: Final answer
    x = 12,141.29

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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.