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Finding the Fourth Proportional to 7,285.80, 10,936.80 and 4,515.60

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Solution

The fourth proportional to 7,285.80, 10,936.80 and 4,515.60 is: 6,778.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,285.80 : 10,936.80 = 4,515.60 : x
  2. Step 2: Convert to fraction form
    7,285.80/10,936.80 = 4,515.60/x
  3. Step 3: Cross multiply
    7,285.80x = 10,936.80 × 4,515.60
  4. Step 4: Simplify right side
    7,285.80x = 49,386,214.08
  5. Step 5: Solve for x
    x = 49,386,214.08/7,285.80
  6. Step 6: Final answer
    x = 6,778.42

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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.