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Finding the Fourth Proportional to 7,954.48, 11,935.92 and 5,781.20

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Solution

The fourth proportional to 7,954.48, 11,935.92 and 5,781.20 is: 8,674.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,954.48 : 11,935.92 = 5,781.20 : x
  2. Step 2: Convert to fraction form
    7,954.48/11,935.92 = 5,781.20/x
  3. Step 3: Cross multiply
    7,954.48x = 11,935.92 × 5,781.20
  4. Step 4: Simplify right side
    7,954.48x = 69,003,940.70
  5. Step 5: Solve for x
    x = 69,003,940.70/7,954.48
  6. Step 6: Final answer
    x = 8,674.85

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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.