Home / 20,119.66-30,184.72-7,639.75

Finding the Fourth Proportional to 20,119.66, 30,184.72 and 7,639.75

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Solution

The fourth proportional to 20,119.66, 30,184.72 and 7,639.75 is: 11,461.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,119.66 : 30,184.72 = 7,639.75 : x
  2. Step 2: Convert to fraction form
    20,119.66/30,184.72 = 7,639.75/x
  3. Step 3: Cross multiply
    20,119.66x = 30,184.72 × 7,639.75
  4. Step 4: Simplify right side
    20,119.66x = 230,603,733.25
  5. Step 5: Solve for x
    x = 230,603,733.25/20,119.66
  6. Step 6: Final answer
    x = 11,461.61

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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.