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Finding the Fourth Proportional to 7,906.30, 11,855.54 and 2,639.50

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Solution

The fourth proportional to 7,906.30, 11,855.54 and 2,639.50 is: 3,957.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,906.30 : 11,855.54 = 2,639.50 : x
  2. Step 2: Convert to fraction form
    7,906.30/11,855.54 = 2,639.50/x
  3. Step 3: Cross multiply
    7,906.30x = 11,855.54 × 2,639.50
  4. Step 4: Simplify right side
    7,906.30x = 31,292,674.79
  5. Step 5: Solve for x
    x = 31,292,674.79/7,906.30
  6. Step 6: Final answer
    x = 3,957.94

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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.