Home / 7,857.39-11,791.47-3,240.39

Finding the Fourth Proportional to 7,857.39, 11,791.47 and 3,240.39

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Solution

The fourth proportional to 7,857.39, 11,791.47 and 3,240.39 is: 4,862.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,857.39 : 11,791.47 = 3,240.39 : x
  2. Step 2: Convert to fraction form
    7,857.39/11,791.47 = 3,240.39/x
  3. Step 3: Cross multiply
    7,857.39x = 11,791.47 × 3,240.39
  4. Step 4: Simplify right side
    7,857.39x = 38,208,961.47
  5. Step 5: Solve for x
    x = 38,208,961.47/7,857.39
  6. Step 6: Final answer
    x = 4,862.81

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1.5x scale

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.