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Finding the Fourth Proportional to 7,174.26, 9,900.41 and 3,987.57

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Solution

The fourth proportional to 7,174.26, 9,900.41 and 3,987.57 is: 5,502.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,174.26 : 9,900.41 = 3,987.57 : x
  2. Step 2: Convert to fraction form
    7,174.26/9,900.41 = 3,987.57/x
  3. Step 3: Cross multiply
    7,174.26x = 9,900.41 × 3,987.57
  4. Step 4: Simplify right side
    7,174.26x = 39,478,587.87
  5. Step 5: Solve for x
    x = 39,478,587.87/7,174.26
  6. Step 6: Final answer
    x = 5,502.81

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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.