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Finding the Fourth Proportional to 12,720.42, 17,550.41 and 7,414.32

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Solution

The fourth proportional to 12,720.42, 17,550.41 and 7,414.32 is: 10,229.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720.42 : 17,550.41 = 7,414.32 : x
  2. Step 2: Convert to fraction form
    12,720.42/17,550.41 = 7,414.32/x
  3. Step 3: Cross multiply
    12,720.42x = 17,550.41 × 7,414.32
  4. Step 4: Simplify right side
    12,720.42x = 130,124,286.65
  5. Step 5: Solve for x
    x = 130,124,286.65/12,720.42
  6. Step 6: Final answer
    x = 10,229.56

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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.