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Finding the Fourth Proportional to 7,084.38, 9,775.75 and 3,940.38

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Solution

The fourth proportional to 7,084.38, 9,775.75 and 3,940.38 is: 5,437.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,084.38 : 9,775.75 = 3,940.38 : x
  2. Step 2: Convert to fraction form
    7,084.38/9,775.75 = 3,940.38/x
  3. Step 3: Cross multiply
    7,084.38x = 9,775.75 × 3,940.38
  4. Step 4: Simplify right side
    7,084.38x = 38,520,169.79
  5. Step 5: Solve for x
    x = 38,520,169.79/7,084.38
  6. Step 6: Final answer
    x = 5,437.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.