Home / 8,939.64-12,338.50-5,163.42

Finding the Fourth Proportional to 8,939.64, 12,338.50 and 5,163.42

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Solution

The fourth proportional to 8,939.64, 12,338.50 and 5,163.42 is: 7,126.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,939.64 : 12,338.50 = 5,163.42 : x
  2. Step 2: Convert to fraction form
    8,939.64/12,338.50 = 5,163.42/x
  3. Step 3: Cross multiply
    8,939.64x = 12,338.50 × 5,163.42
  4. Step 4: Simplify right side
    8,939.64x = 63,708,857.67
  5. Step 5: Solve for x
    x = 63,708,857.67/8,939.64
  6. Step 6: Final answer
    x = 7,126.56

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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.