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Finding the Fourth Proportional to 9,940.75, 13,719.12 and 5,465.38

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Solution

The fourth proportional to 9,940.75, 13,719.12 and 5,465.38 is: 7,542.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,940.75 : 13,719.12 = 5,465.38 : x
  2. Step 2: Convert to fraction form
    9,940.75/13,719.12 = 5,465.38/x
  3. Step 3: Cross multiply
    9,940.75x = 13,719.12 × 5,465.38
  4. Step 4: Simplify right side
    9,940.75x = 74,980,204.07
  5. Step 5: Solve for x
    x = 74,980,204.07/9,940.75
  6. Step 6: Final answer
    x = 7,542.71

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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.