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Finding the Fourth Proportional to 29,556.68, 40,794.90 and 20,129

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Solution

The fourth proportional to 29,556.68, 40,794.90 and 20,129 is: 27,782.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,556.68 : 40,794.90 = 20,129 : x
  2. Step 2: Convert to fraction form
    29,556.68/40,794.90 = 20,129/x
  3. Step 3: Cross multiply
    29,556.68x = 40,794.90 × 20,129
  4. Step 4: Simplify right side
    29,556.68x = 821,160,542.10
  5. Step 5: Solve for x
    x = 821,160,542.10/29,556.68
  6. Step 6: Final answer
    x = 27,782.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.