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Finding the Fourth Proportional to 7,661.44, 11,485.20 and 2,729.92

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Solution

The fourth proportional to 7,661.44, 11,485.20 and 2,729.92 is: 4,092.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,661.44 : 11,485.20 = 2,729.92 : x
  2. Step 2: Convert to fraction form
    7,661.44/11,485.20 = 2,729.92/x
  3. Step 3: Cross multiply
    7,661.44x = 11,485.20 × 2,729.92
  4. Step 4: Simplify right side
    7,661.44x = 31,353,677.18
  5. Step 5: Solve for x
    x = 31,353,677.18/7,661.44
  6. Step 6: Final answer
    x = 4,092.40

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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.