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Finding the Fourth Proportional to 7,521.13, 10,379 and 4,163.75

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Solution

The fourth proportional to 7,521.13, 10,379 and 4,163.75 is: 5,745.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,521.13 : 10,379 = 4,163.75 : x
  2. Step 2: Convert to fraction form
    7,521.13/10,379 = 4,163.75/x
  3. Step 3: Cross multiply
    7,521.13x = 10,379 × 4,163.75
  4. Step 4: Simplify right side
    7,521.13x = 43,215,561.25
  5. Step 5: Solve for x
    x = 43,215,561.25/7,521.13
  6. Step 6: Final answer
    x = 5,745.89

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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.