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Finding the Fourth Proportional to 7,940.64, 11,910.32 and 3,259.32

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Solution

The fourth proportional to 7,940.64, 11,910.32 and 3,259.32 is: 4,888.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,940.64 : 11,910.32 = 3,259.32 : x
  2. Step 2: Convert to fraction form
    7,940.64/11,910.32 = 3,259.32/x
  3. Step 3: Cross multiply
    7,940.64x = 11,910.32 × 3,259.32
  4. Step 4: Simplify right side
    7,940.64x = 38,819,544.18
  5. Step 5: Solve for x
    x = 38,819,544.18/7,940.64
  6. Step 6: Final answer
    x = 4,888.72

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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.