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Finding the Fourth Proportional to 7,911.34, 11,862.89 and 3,958.34

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Solution

The fourth proportional to 7,911.34, 11,862.89 and 3,958.34 is: 5,935.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,911.34 : 11,862.89 = 3,958.34 : x
  2. Step 2: Convert to fraction form
    7,911.34/11,862.89 = 3,958.34/x
  3. Step 3: Cross multiply
    7,911.34x = 11,862.89 × 3,958.34
  4. Step 4: Simplify right side
    7,911.34x = 46,957,287.74
  5. Step 5: Solve for x
    x = 46,957,287.74/7,911.34
  6. Step 6: Final answer
    x = 5,935.44

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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.