Home / 8,959.21-13,438.80-3,115.81

Finding the Fourth Proportional to 8,959.21, 13,438.80 and 3,115.81

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Solution

The fourth proportional to 8,959.21, 13,438.80 and 3,115.81 is: 4,673.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,959.21 : 13,438.80 = 3,115.81 : x
  2. Step 2: Convert to fraction form
    8,959.21/13,438.80 = 3,115.81/x
  3. Step 3: Cross multiply
    8,959.21x = 13,438.80 × 3,115.81
  4. Step 4: Simplify right side
    8,959.21x = 41,872,747.43
  5. Step 5: Solve for x
    x = 41,872,747.43/8,959.21
  6. Step 6: Final answer
    x = 4,673.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.