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Finding the Fourth Proportional to 7,296.80, 10,928.78 and 5,115.27

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Solution

The fourth proportional to 7,296.80, 10,928.78 and 5,115.27 is: 7,661.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,296.80 : 10,928.78 = 5,115.27 : x
  2. Step 2: Convert to fraction form
    7,296.80/10,928.78 = 5,115.27/x
  3. Step 3: Cross multiply
    7,296.80x = 10,928.78 × 5,115.27
  4. Step 4: Simplify right side
    7,296.80x = 55,903,634.89
  5. Step 5: Solve for x
    x = 55,903,634.89/7,296.80
  6. Step 6: Final answer
    x = 7,661.40

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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.