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Finding the Fourth Proportional to 9,940.78, 13,718.10 and 5,464.49

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Solution

The fourth proportional to 9,940.78, 13,718.10 and 5,464.49 is: 7,540.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,940.78 : 13,718.10 = 5,464.49 : x
  2. Step 2: Convert to fraction form
    9,940.78/13,718.10 = 5,464.49/x
  3. Step 3: Cross multiply
    9,940.78x = 13,718.10 × 5,464.49
  4. Step 4: Simplify right side
    9,940.78x = 74,962,454.56
  5. Step 5: Solve for x
    x = 74,962,454.56/9,940.78
  6. Step 6: Final answer
    x = 7,540.90

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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.