Home / 20,109.78-30,141.99-9,709.38

Finding the Fourth Proportional to 20,109.78, 30,141.99 and 9,709.38

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Solution

The fourth proportional to 20,109.78, 30,141.99 and 9,709.38 is: 14,553.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,109.78 : 30,141.99 = 9,709.38 : x
  2. Step 2: Convert to fraction form
    20,109.78/30,141.99 = 9,709.38/x
  3. Step 3: Cross multiply
    20,109.78x = 30,141.99 × 9,709.38
  4. Step 4: Simplify right side
    20,109.78x = 292,660,034.87
  5. Step 5: Solve for x
    x = 292,660,034.87/20,109.78
  6. Step 6: Final answer
    x = 14,553.12

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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.