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Finding the Fourth Proportional to 20,791.80, 29,147.40 and 20,791.80

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Solution

The fourth proportional to 20,791.80, 29,147.40 and 20,791.80 is: 29,147.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,791.80 : 29,147.40 = 20,791.80 : x
  2. Step 2: Convert to fraction form
    20,791.80/29,147.40 = 20,791.80/x
  3. Step 3: Cross multiply
    20,791.80x = 29,147.40 × 20,791.80
  4. Step 4: Simplify right side
    20,791.80x = 606,026,911.32
  5. Step 5: Solve for x
    x = 606,026,911.32/20,791.80
  6. Step 6: Final answer
    x = 29,147.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.