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Finding the Fourth Proportional to 7,894.60, 11,842.40 and 2,629.40

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Solution

The fourth proportional to 7,894.60, 11,842.40 and 2,629.40 is: 3,944.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,894.60 : 11,842.40 = 2,629.40 : x
  2. Step 2: Convert to fraction form
    7,894.60/11,842.40 = 2,629.40/x
  3. Step 3: Cross multiply
    7,894.60x = 11,842.40 × 2,629.40
  4. Step 4: Simplify right side
    7,894.60x = 31,138,353.92
  5. Step 5: Solve for x
    x = 31,138,353.92/7,894.60
  6. Step 6: Final answer
    x = 3,944.26

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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.