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Finding the Fourth Proportional to 5,791.93, 7,992.79 and 3,139.30

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Solution

The fourth proportional to 5,791.93, 7,992.79 and 3,139.30 is: 4,332.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,791.93 : 7,992.79 = 3,139.30 : x
  2. Step 2: Convert to fraction form
    5,791.93/7,992.79 = 3,139.30/x
  3. Step 3: Cross multiply
    5,791.93x = 7,992.79 × 3,139.30
  4. Step 4: Simplify right side
    5,791.93x = 25,091,767.79
  5. Step 5: Solve for x
    x = 25,091,767.79/5,791.93
  6. Step 6: Final answer
    x = 4,332.20

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1.5x scale

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.