Home / 19,771.82-29,661.68-7,291.90

Finding the Fourth Proportional to 19,771.82, 29,661.68 and 7,291.90

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Solution

The fourth proportional to 19,771.82, 29,661.68 and 7,291.90 is: 10,939.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,771.82 : 29,661.68 = 7,291.90 : x
  2. Step 2: Convert to fraction form
    19,771.82/29,661.68 = 7,291.90/x
  3. Step 3: Cross multiply
    19,771.82x = 29,661.68 × 7,291.90
  4. Step 4: Simplify right side
    19,771.82x = 216,290,059.70
  5. Step 5: Solve for x
    x = 216,290,059.70/19,771.82
  6. Step 6: Final answer
    x = 10,939.31

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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.