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Finding the Fourth Proportional to 9,174.87, 12,661.47 and 5,195.88

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Solution

The fourth proportional to 9,174.87, 12,661.47 and 5,195.88 is: 7,170.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,174.87 : 12,661.47 = 5,195.88 : x
  2. Step 2: Convert to fraction form
    9,174.87/12,661.47 = 5,195.88/x
  3. Step 3: Cross multiply
    9,174.87x = 12,661.47 × 5,195.88
  4. Step 4: Simplify right side
    9,174.87x = 65,787,478.74
  5. Step 5: Solve for x
    x = 65,787,478.74/9,174.87
  6. Step 6: Final answer
    x = 7,170.40

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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.